Study of reflection-typed LED surgical shadowless lamp with thin film Ag-based metallic glass

Abstract

Abstract Traditional surgical shadowless halogen lamp can cause mercury pollution and increase heat radiation. In this study, single one light-emitting diode (LED) is used as light source for shadowless surgical light, whose light performance is comparable with traditional halogen light bulbs. This surgical shadowless lamp with multi-focal ellipsoidal curve reflector was designed and made. Reflection-typed shadowless surgical light is better than projection-typed one. This design can reduce significantly the use of LEDs. Various recipes of Ag–Cu–Al thin film metallic glass (Ag-based TFMG) were determined and coated on the curve as reflector materials, possessing great mechanical strength and anti-bacterial effect. The Ag-based can affect the light temperature and light color. Appropriate alloy elements of this metallic glass could be formulated to absorb IR range wavelength to reduce the wound damage during surgery. For the optical measurement, the central illuminance (Ec) was 110,500 lx, d 50 /d 10 was 58.9% and working depth was 32.8 cm. The shadow dilution with single mask and double masks were 58.96% and 56.16%, respectively. Then, for the combination of tubes, the shadow dilution of lamp with single mask and double masks were 57.46% and 58.03%, respectively. The experimental results meet the rule of IEC-60601-2-41.