Abstract
As for the optical measurement, the longer the focal length of collimator is, the less the measurement error is. However, the longer the focal length is, the more difficult the optical design is. It’s higher application value to design long focal length collimator with wide-view. The paper designs a collimator with 2000mm focal length, 4 degree field of view and its wavelength range is from 480nm to 750nm. The collimator is employed in the camera resolution detection system. It adopts the apochromatism three-piece-type structure and the secondary spectrum is corrected. The paper analyses the imaging quality of the optical system and the MTF curve is presented.
Highlights
Collimator is an important apparatus for the optical experiments and measurements
The collimator used in the camera resolution detection system is designed
According to the related parameters, the requirements for the collimator are that the focal length is 2000mm, the view angle is 4 degrees and the wavelength range is from 480nm to 750nm
Summary
Collimator is an important apparatus for the optical experiments and measurements. It is a measurement base for the correction and imaging detection of the infinite conjugate imaging optical system (Ji, 2007, pp.). In the camera resolution detection system, the objective of the collimator is required to image with apochromatism and flat view field to get high resolution imaging quality and which makes the design more difficult. The objective’s structure is complex because of its characteristics (Zhou, 2004, pp.589592). The collimator used in the camera resolution detection system is designed
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