Single Prism Research Articles

Combining Fresnel and block prisms to measure large angles of strabismic deviation

PurposeA method was developed to measure strabismic angles >50Δ by stacking commercially available Fresnel and block prisms in the same direction (“piggyback prisms”). MethodsWith a laser pointer (wavelength of 532 nm) as the light source, the deviation of the laser spot produced by the stacked prisms was measured on a tangent screen placed 100 cm away from the prisms. To the obtained data with combinations of Fresnel prisms (5Δ-40Δ) and block prisms (10Δ-50Δ), a cubic surface function was fitted by polynomial regression. ResultsThe combined effect of stacked prisms was always greater than the arithmetic sum of the labeled values of two prisms (by up to 66Δ), increasing exponentially with each prism power and reaching the maximum of 156Δ for the Fresnel/block combination of 30Δ/50Δ. We obtained contour plots to evaluate the optically induced additivity error and constructed look-up tables for quickly determining the combined effect of the prisms based on their labeled values. ConclusionsStacking prisms is a practical method to evaluate a large strabismic angle that cannot be measured by any single prism and is especially useful in dealing with severely paralytic strabismus.

Numerical study of ship hydrodynamics on ice resistance during ice sheet breaking

For icebreakers to navigate polar routes, the ability to break through ice sheet is extremely important. To quantify this, technology that can estimate the mechanical behaviors of ice and ships is essential. The purpose of this study is to analyze the response of the icebreaker Araon breaking through ice sheet. Drucker-Prager yield function and fracture energy based on continuum damage mechanics were applied to the single prism ice compression simulation. The damage in the single ice initiated and evolved as the yield function and fracture energy were assigned. The icebreaking pattern was analyzed from the cone-ice sheet interaction simulations. Patterns similar to those of previous studies were observed qualitatively. The free decay of Araon was numerically analyzed using the Hydrodynamic plug-in HydroQus that was recently developed by present authors, and very accurate ship motion responses were confirmed. The effect of hydrodynamic forces on ice resistance was analyzed through ice sheet breaking simulations. It was found that radiation forces significantly affect the heave and pitch motions of the icebreaker and increase ice resistance. HydroQus has proven to be able to efficiently and accurately simulate the ship-ice interactions compared to other approaches such as computational fluid dynamics.

Simultaneous polarization and wavelength merging for efficient fiber coupling system using a designed one-mirror prism

The difference in beam quality between the fast-axis and slow-axis directions of semiconductor lasers limits its wide application. Conventional development methods for solving this problem require a large number of optical components. A one-mirror prism shaping scheme based on wavelength combination and polarization combination techniques is proposed to simultaneously halve the optical width in the slow-axis direction and fill in the dark region in the fast-axis direction to improve and equalize the beam quality. Compared with the traditional beam shaping scheme, the design does not use the cutting-translation-rearrangement of prism technology to avoid uneven spot distribution at the same time, the use of the design of a single prism can achieve several functions to improve the efficiency of prism utilization, to avoid the use of prism stacks, the whole system is simple and compact, easy to implement The design couples two laser stacks, both consisting of 10 cm-bars, into the target fiber with a fiber characteristic of 400 μm, 0.22. An output power of 1415.8 W is obtained from the output end of the fiber, and the coupling efficiency is calculated to be 88.5%.

Density and magnetization models for the Acoculco geothermal field by joint 3D inversion

We determined density and magnetization magnitude in the Acoculco geothermal field, Mexico. For that purpose, we used terrestrial gravity and aerial magnetometry data. For the joint inversion of both sets of data, we assumed a petrophysical relation between density and magnetization that is also unknown. Along the inversion process, we estimated density, magnetization in every single prism in a 3D mesh and the coefficients from the petrophysical equation. The deeper part of the 3D model seems to describe a semicircular shape, that are apparently filled of intrusions. The difference between density and magnetization inside this semicircular shape can give us some insight about the characteristics of such intrusions, The shallowest part of the model keeps very good relation with the surface faults mapped.

Calcite Twinning in Mollusk Shells and Carrara Marble

AbstractMollusk shells protect the animals that form and inhabit them. They are composites of minerals and organics, with diverse mesostructures, including nacre, prismatic calcite, crossed‐lamellar aragonite, and foliated calcite. Twins, that is, crystals mirror symmetric with respect to their coherent interface, occurring as formation or deformation twins, are observed in all mollusk shell mesostructures but never within calcite prisms. Here, nanotwins and microwins within single calcite prisms are observed in different shells. Using Polarization‐dependent Imaging Contrast (PIC) mapping with 20–60 nm resolution, twins are observed to be 0.2–3 µm thick layers of differently oriented and colored crystals with respect to the main prism crystal. Multiple twins are interspersed with the prism crystal, parallel to one another, and similarly oriented. When comparing images of calcite prisms and twins obtained by PIC mapping and by Electron Back‐Scattered Diffraction (EBSD), the images correspond precisely. All twins are e‐twin types, with 127° angular distance between c‐axes. E‐twins are the most common deformation twins in geologic calcite, as also observed here in Carrara marble. Location of all twins near the outer surface of all shells and e‐twin type both suggest that twins within calcite prisms in mollusk shells result from deformation twinning.

Hallmark of Dentistry: The Evolution and Benefits of the Dental Magnifying Loupe

Background Dental education has increasingly recognized magnification as an integral part of dentistry and based on the advantages and benefits recommends its use as early as in the first year of dental school. Dental students and practitioners have become aware of their enhanced quality of work, while preventing eye fatigue and strain. Thanks to proper ergonomics, long-term bodily afflictions such as MSDs can be prevented and increase the dental students and practitioners’ ability to enhance career longevity.Case Description This review aims to present the evolution and benefits of dental magnifying loupes used to improve diagnosis and treatment outcomes through enhancement of the visual acuity, thus preventing musculoskeletal disorders and improving ergonomics. An overview of the type of magnification is presented discussing single lens loupes, Galilean loupes and prism loupes. Furthermore, visual acuity, working distance and depth of field, declination angle and working angle, field of view and convergence angle, magnification and illumination are explained.Practical Implications Loupes offer the dental profession enhanced visualization of the operating field, while at the same time they reduce eyestrain providing ergonomic advantages, and preventing long-term complications such as musculoskeletal disorders (MSDs). When dental students and practitioners wear dental loupes in an ergonomically correct neutral position, significantly more benefits have been reported compared to operators that do not use magnification. Dental magnifying loupes are becoming the expected hallmark of dentistry; thus, they are considered a new identity and icon of the dental profession.

Pulsed Er:YAG single corner cube ring cavity with variable output ratio

In this paper, a ring cavity of Er:YAG laser with a single corner cube prism is investigated. Due to the depolarization effect of the corner cube, the tunable output coupling ratio was 0.25% to 72.67% by changing the angle of the λ / 4 plate according to the calculation results of Jones matrix. An experiment for checking the anti-detuning performances of the single corner cube cavity was also carried out. The results indicated that the output power was stable at the rotating angles of <3.06 deg and 1.637 deg along the vertical and horizontal directions, respectively. Under continuous wave operation, a 5.4 W vertically-polarized laser of 1645.1 nm was acquired through double polarizers with the beam quality factors (M2) of 1.17 in the x direction and 1.42 in the y direction, and the slope efficiency was 45.47%. Additionally, under the condition of a pulse-repetition-frequency (PRF) of 200 Hz, the pump power of 29.04 W, a maximum pulse energy of 2.2 mJ was realized, and the minimum pulse width was 86 ns, leading to a peak power of 25.58 KW.

Heat transfer enhancement in a square channel with a set of triangular prisms: an experimental study

ABSTRACT In this study, heat transfer behavior in a channel adapted with a set of equilateral triangular prisms was investigated experimentally in a turbulent flow regime, with a range of Reynolds numbers corresponding to 1x104<Re<8x104. The cross-section of the channel is square, and the triangular prisms were installed in the middle of the channel. In the test section of the channel, only the bottom wall was heated with constant heat flux. The square channel geometry and the triangular obstacle dimensions were assumed as fixed. Multiple equilateral triangular prisms were used with three different tandem arrangements and four different attack angles in the cross-flow of air. The heated wall temperatures, and channel inlet and outlet temperatures were measured using thermocouples on the test section. The triangular prisms changes flow structure in the flow field by cross-flow interaction, and increases the heat transfer from the heated surface. It was observed that compared to the smooth channel, the heat transfer was enhanced by about 22% for a single triangular prism. The obtained results are given as dimensionless parameters and discussed in this study. Results are compared with the existing literature and show strong similarities. Overall, in our study, triangular prisms showed a more noticeable increase in heat transfer for channel flows.

Cryogenic Refocusing of an Ultrawide FOV Long-Wave Infrared Imaging Spectrometer in a Geostationary Orbit

Imaging spectrometers in a geostationary orbit have unique advantages for various applications ranging from atmospheric to ocean remote sensing. To increase remote sensing range, we developed an ultrawide FOV LWIR imaging spectrometer. We compared several spectrometers and picked the “Offner + center single prism” form, which can simplify the system structure and increase cryogenic adaptability, making it ideal for ultrawide FOV designs. However, to reduce background radiation in LWIR bands, the imaging spectrometer was cooled to 123 K, causing the image plane to deviate from the focal plane. Therefore, we propose a cryogenic refocusing method based on an inclined slit in this paper that employs the full width half maximum (FWHM) of the spectral response function (SRF) as the refocusing evaluation function. By analyzing the effect of deviation on FWHM, the refocusing principle is well explained. The slit is tilted to find the minimal function value, so the deviation amount is calculated using differences in FOVs corresponding to the minimum FWHM at different temperatures. Experiments show that the FWHM is nearly 2.1 pixels after refocusing and that the actual spectral resolution is within 120 nm after spectral calibration. The method reduced the design time and provided references for optical systems experiencing refocusing issues in remote sensing imaging.

Q-Switched Anti-Misalignment Ho: YLF Ring Cavity Laser with Single Corner Cube Prism

Q-Switched Anti-Misalignment Ho: YLF Ring Cavity Laser with Single Corner Cube Prism

Two identical tandem square prisms with rounded edges and hard marine fouling at incidence in cross-flow: Effect of spacing and Reynolds number on unsteady fluid dynamics

Because of their long submerged columns, deep-draft semi-submersible floating structures are particularly susceptible to vortex-induced motions. This paper focuses on the steady and unsteady forces that act on such a column pair, as well as on the frequency and strength of the shed vortices behind the downstream column. Wind tunnel experiments were performed on two rounded and lightly rough square-section prisms in cross-flow for Reynolds numbers from 100,000 up to 7 million. They are arranged inline at centre-to-centre distances of S/D = 2.8, 4, and 5.6 and at 0° or 45° incidence angle. The trend of the drag curve for the upstream prism deviates at S/D = 2.8 and 4 sharply from that for a single prism. The drag force on the downstream prism strongly depends on both S/D and α. At S/D = 2.8, a thrust force occurs either in certain (α = 0°) or in all (α = 45°) flow states. Larger spacing values lead to an overall higher drag and a flattening of the Cd2 (ReD) curve. The highest fluctuating lift forces on the downstream prism are obtained at α = 45°. Regarding the vortex shedding frequency, differences between both incidence angles occur at S/D = 5.6 only.

A Low-Profile, Risley-Prism-Based, Beam-Steerable Antenna Employing a Single Flat Prism

We present a low-profile, mechanically beam-steerable antenna that implements the Risley prism beam-steering concept using only a single flat prism. The proposed antenna achieves 2-D beam steering and consists of two parts: a holographic leaky-wave antenna and a phase-shifting surface (PSS) that acts as a flat prism. The lower holographic leaky-wave antenna acts as the feed for the prism and provides a phase-shifting gradient over its output aperture. When paired with the flat prism, the system can provide 2-D beam steering by mechanically rotating the two layers against each other. Unlike conventional Risley-prism-based beam-steerable antennas, the proposed approach results in a very low-profile antenna and does not need spatial illumination of a two-prism system with a separate feed antenna. The flat prism is implemented using a PSS consisting of low-pass, hexagonal-shaped, spatial phase shifters. A prototype antenna with an overall thickness of only <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$1.1\lambda _{0}$ </tex-math></inline-formula> at 10 GHz was designed, fabricated, and experimentally characterized. Measurement results agree well with theoretical predictions and both show wide-angle beam scanning ranging from 0° to 57° in the elevation plane and 0° to 360° in the azimuth plane. The proposed antenna system has an equivalent aperture diameter of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$7.1\lambda _{0}$ </tex-math></inline-formula> and a measured peak gain of 22.3 dBc at 10 GHz corresponding to an aperture efficiency of 34.5%. The proposed concept is expected to be useful in designing low-profile, beam-steerable antennas in which the scanning speed can be traded off to reduce system complexity.

Single-prism polarizer for laser emission with higher power

Subject of study. The properties of a new prismatic polarizer-analyzer of laser (optical) emission with higher power were investigated. The polarizer was designed based on a birefringent crystal in the form of a single total internal reflection prism with a triangular cross-section. Spectral dependences of the geometry of the cross-section in the refraction plane were investigated for two selected polarizer materials. Aim. The study was aimed at designing a polarizer in the form of an individual single-element device capable of functioning in the laser beams with higher power that maintains the original direction of radiation propagation with minimum optical losses and without anamorphosis of the beam cross-section. Method. The transmission of radiation through an optically anisotropic crystalline prism with an arbitrary triangular cross-section was investigated using mathematical modeling. Snell’s equations, which were developed for refraction and total internal reflection of radiation on the faces of an anisotropic prism, were used. Based on the obtained solutions, the spectral dependences of angular structural parameters of prismatic polarizers were calculated under conditions of maintaining the collinearity of the input and output rays and their refractions on the input and output faces fixed at Brewster’s angles. The energy losses and spectral ranges of operation of prismatic polarizers composed of two selected crystalline materials with a priori defined geometry were analyzed. Main results. A new prismatic polarizer was designed and investigated. Its main feature corresponds to anisotropic total internal reflection of optical radiation from one of the faces of a birefringent single prism under Brewster’s refractions on the input and output faces. We established that the device exhibits minimum optical losses, collinearity (or coaxiality) of unpolarized and polarized beams, and no anamorphotic distortion of the cross-section of the output p-polarized beam. Furthermore, we demonstrated that in the case of virtually symmetric prisms for which the difference between the structural angles and Brewster’s angles is 3°–7°, the effect of anamorphism of the beam cross-section is negligibly small. The spectral ranges of the device operation were determined for several specific designs. A weak dependence of spectral bands on the selected orientations of the polarizer crystal was observed. It manifests in the symmetry of the obtained dependences. We demonstrated that the prisms composed of YVO4 crystals are the most advantageous for obtaining the widest spectral bands in the near- and mid-infrared spectral ranges. Angular tolerances for the divergence of the incident beams were determined based on analysis of the angular deviations of the incidence angles from the Brewster’s angles. The device can also be used in observational optics as an anisotropic equivalent of the isotropic Dove prism. The difference between the proposed device and the Dove prism is the fact that the proposed device provides the potential of observing an image in ideally linearly polarized light. Practical significance. The proposed single-element design of a prismatic polarizer with Brewster’s input and output faces enables the use of the device for polarization (or polarization analysis) of laser beams with power higher than the values for which the standard multicomponent polarizers are applicable.

Experimental study on energy conversion of flow induced motion for two triangular prisms in staggered arrangement

The superiority on energy conversion of triangular prism has been verified by previous studies and the evolution of hard galloping (HG) and soft galloping (SG) with different parameters have also been preliminarily investigated. Based on flow induced motion energy conversion system (FIMECS), the results of oscillation responses and energy conversion for spacing ratio of 0 ≤ S/D ≤ 9, load resistances of 8Ω≤RL ≤ 21Ω and Reynolds number of 46,877 ≤ Re ≤ 108,577 are analyzed and discussed. Additionally, the power density of the FIMECS is calculated based on the test results, to seek the optimal mode of generator arrangement of the FIMECS. The main conclusions can be summarized as follows: (1) For 1 ≤ S/D ≤ 5, the amplitude of staggered upstream triangular prism (S–U-Tri-P) is obviously lower than that of the staggered upstream single prism (S–U-Single-P), but the amplitude of staggered downstream triangular prism (S-D-Tri-P) is higher than that of staggered downstream single prism (S-D-Single-P). For 6 ≤ S/D ≤ 9, vice versa. (2) The phase difference between two staggered prisms with different spacing ratios and different flow velocity are mostly maintained at a stable value. The synergistic oscillation performance of the two staggered triangular prisms is better. (3) In this paper, the optimal active power of two staggered triangular prisms is 26.43 W (S/D = 6), which is significantly 1.7 times that of the single triangular prism (Pharn = 15 W). (4) For spacing ratio of 4 ≤ S/D ≤ 6, which is conducive to ocean current energy utilization and the power density of the FIMECS is in the range of 0.034–0.050 kW/m3 (U = 1.24 m/s).

Measurements of Aquatic Particle Volume Scattering Function up to 178.5° in the East China Sea

Particulate volume scattering function (VSF), especially at angles larger than 170°, is of particular importance for interpreting ocean optical remote sensing signals and underwater imagery. In this study, a laboratory-based VSF instrument (VSFlab) adopting the periscopic optical system was developed to obtain VSF measurements from 1°–178.5°. In the VSFlab, a new prism design that simply combines a single prism and a neutral density filter was proposed to more efficiently reduce the stray light in the backward direction, while a detailed calibration procedure was given. A full validation based on standard beads of various sizes and a comparison with the results from LISST-VSF and POLVSM indicated that the VSFlab can provide reliable results from 1° to 178.5°. VSFlab measurements in the East China Sea (ECS) exhibited a moderate increase (not more than 5 times) in VSF from 170° to 178.5° rather than a sharp increase of more than one order of magnitude presented in other instrument results measured in other coastal regions. The estimates of the particulate backscattering coefficient using single angle scattering measurements near 120° or 140° and suitable χp were justified. Two types of the VSFs with different size distribution and shape parameters in the ECS can be distinguished based on the variability of χp after 155°. The measured VSF could provide a basis for the parameterization of VSF in the radiative transfer model and the variability of χp in the backward direction had the potential to be used to characterize the particles in the coastal region of the ECS.

Optical Trapping-Induced New Polymorphism of β-Cyclodextrin in Unsaturated Solution

A new polymorph of β-cyclodextrin (β-CD) was produced by optical trapping with a 1064 nm continuous wave laser beam in D2O solution. Upon optical trapping of β-CD in unsaturated solutions, a single prism crystal or multiple plate crystals were formed at and near the laser focus. The resulting crystals differed in morphology and in the Raman spectrum. Furthermore, the solubility of the plate crystal in D2O was much lower than that of the prism crystal, implying that the former crystal is thermodynamically more stable than the latter. The single-crystal X-ray crystallographic analysis showed that the prism crystal has practically the same crystallographic parameters as the crystal reported for β-CD dodecahydrate and is thought to be the thermodynamically most stable phase. These results reveal that the plate crystal is a new polymorph characteristic of optical trapping. Crucially, this is the first success to produce a new polymorph via the laser-induced crystallization method. More interestingly, the generation probability of these two polymorphs turned out to be a critical function of the initial β-CD concentration, laser power, and laser polarization mode. In particular, the polymorphism could be entirely controlled by adjusting the initial concentration, which allowed us to obtain pure prism and plate crystals at high and low CD concentrations, respectively. The dynamics and mechanism of this unique optical trapping-induced polymorphism are discussed in terms of the pre-nucleation cluster size determined by the initial concentration, the trapping efficiency as a function of the cluster size and the laser power, and the molecular alignment in the pre-nucleation clusters steered by the laser polarization mode.

Heterogeneous distribution of shell matrix proteins in the pearl oyster prismatic layer

Shell formation in molluscan bivalves is regulated by organic matrices composed of biological macromolecules, but how these macromolecules assemble in vitro remains elusive. Prismatic layer in the pearl oyster Pinctada fucata consists of polygonal prisms enveloped by thick organic matrices. In this study, we found that the organic matrices were heterogeneously distributed, with highly acidic fractions (EDTA-soluble and EDTA-insoluble) embedded inside the prism columns, while basic EDTA-insoluble faction as inter-column framework enveloping the prisms. The intra-column matrix was enriched in aspartic acid whereas the inter-column matrix was enriched in glycine, tyrosine and phenylalanine. Moreover, the intra-column matrix contained sulfo group further contributing to its acidic property. Proteomics data showed that the intra-column proteins mainly consisted of acidic proteins, while some typical matrix proteins were absent. The absent matrix proteins such as shematrin family and KRMP family were highly basic and contained aromatic amino acids, suggesting that electric charge and hydrophobic effect might play a role in the matrix heterogeneity. Interestingly, chitin metabolism related proteins were abundant in the inter-column matrix, which may be involved in reconstructing the prism organic matrix. Overall, our study suggests that each single prism grew in an enclosed organic envelope and the organic matrix undergoes rearrangement, thus leading to the peculiar growth of the prismatic layer.

Evidence of asymmetric beaming in a piecewise-linear propagation channel.

Asymmetric beaming in a piecewise-linear propagation channel is demonstrated for a single photonic-crystal prism at Gaussian-beam illumination. The used hybrid refraction-diffraction mechanism exploits oblique incidence, the first-negative-order deflection at the longer interface, and asymmetry in coupling at the exit interfaces and does not need blocking of transmission by dispersion in the backward illumination case. The Floquet-Bloch mode with left-handed behavior and nearly circular equifrequency dispersion contours is utilized. The outgoing waves may have significantly different spatial distributions for the forward and backward illumination cases, yielding asymmetry in the beaming regime.

Towards a morphology diagram for terrestrial carbonates: Evaluating the impact of carbonate supersaturation and alginic acid in calcite precipitate morphology

Ancient and recent terrestrial carbonate-precipitating systems are characterised by a heterogeneous array of deposits volumetrically dominated by calcite. In these environments, calcite precipitates display an extraordinary morphological diversity, from single crystal rhombohedral prisms, to blocky crystalline encrustations, or spherulitic to dendritic aggregates. Despite many decades of thorough descriptive and interpretative work on these fabrics, relating calcite micro-morphology with sedimentary hydrogeochemical conditions remains a challenge. Environmental interpretations have been hampered by the fact that calcite morphogenesis results from the complex interaction between different physico-chemical parameters which often act simultaneously (e.g., carbonate mineral supersaturation, Mg/Ca ratio of the parental fluid, organic and inorganic additives). To try to experimentally address the sedimentological causes of calcite morphogenesis, an experimental approach yielding a first attempt at a calcite growth-form phase diagram is presented here. The initial aim was to account for the carbonate products experimentally nucleated in alkaline, saline lake settings. These are the result of at least two competing calcite precipitation ‘driving forces’ that affect morphogenesis: the calcite supersaturation level of the parental fluid, and the concentration of microbial-derived organic molecules (alginic acid). A key finding of this study is that common naturally-occurring calcite products such as calcite floating rafts, rhombohedral prismatic forms, di-pyramid calcite crystals, spherulitic calcite grains, or vertically stacked spheroidal calcite aggregates, can be related to specific hydrogeochemical contexts, and their physical transitions pinpointed in a phase diagram. By exploring binary or ternary responses to forcing in morphological phase-space, links between calcite growth forms and (palaeo)environmental conditions can be determined. This provides a truly process-oriented means of navigating questions around carbonate precipitate morphogenesis for the future.

Effect of geometry on the compression characteristics of bonded brickwork

Bonded brickwork walls of large thickness constructed with double or triple bricks are common in loadbearing historical masonry structures in many regions which require interventions and compression capacity evaluation. However, current design provisions for compression capacity prediction are primarily based on single brick prisms and wallette specimens. Due to anisotropic nature of masonry, the strength and deformation characteristics of bonded brickwork with double and triple brick thicknesses are different to the single leaf brickwork; and their design using the provisions of single leaf bonded brickwork specimens may be un-conservative. To expand the knowledge on the compressive behaviour of bonded brickwork, a detailed numerical investigation has been reported in this paper. A simplified Finite element (FE) based micro-modelling technique was implemented to simulate the compression response of bonded brickwork specimens. The developed FE modelling technique was initially verified against the experimental predictions of compressive capacities and axial stress-strain curves. The numerical modelling results iterated that there was no noticeable increase in the compressive capacity of the masonry with increase in the brickwork thicknesses due to increased number of weak head joints. The validated models were then employed to study the effect of slenderness of the bonded brickwork specimens on the axial compression response. The height to thickness (slenderness) ratios of the bonded brickwork were varied from 1.4 to 10.9 for analysing 30 different cases with two brick strengths. Results showed that with increasing slenderness ratio, the compressive strength of the bonded brickwork reduces for all bonded thicknesses. The parametric study indicates that the slenderness ratio influences the compression characteristics of bonded brickwork specimens; subsequently, correction factors for the compressive strengths determined with different slenderness ratios of brickwork specimens are proposed.