Young Optics Inc.

Wei-Ting Chiu

Chia-Chang Lee

Chien-Hsiung Tseng

Chu-Tsung Chan

Sandeep Kumar Paral

An optical measurement apparatus includes a thermal insulation housing, a first light-transmissive plate, a second light-transmissive plate, a heat-conductive layer, a cooling source and a photosensor. The thermal insulation housing, the first light-transmissive plate and the second light-transmissive plate define a chamber. The heat-conductive layer is disposed in the chamber, the cooling source is coupled to the heat-conductive layer, and the photosensor is disposed outside the chamber and on one side of the second light-transmissive plate facing away from the first light-transmissive plate.

Apparatus for measuring optical characteristics of a test optical element under low-temperature environment

An optical lens includes a first lens group, an aperture, and a second lens group which are sequentially arranged along an optical axis from a magnified side to a minified side. The first lens group has a negative refractive power and includes three lenses with refractive powers. The first lens group includes a lens with positive refractive power. The first lens group includes an aspheric lens. The second lens group has a positive refractive power and includes three lenses with refractive power. The second lens group includes a lens with a negative refractive power. The second lens group includes a lens closest to the minified side which is a cemented lens. The second lens group includes an aspheric lens. In the optical lens, a number of the lenses having the refractive powers is within a range from 6 to 8.

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Hsinchu, Taiwan

Wei-Ting Chiu