Alexander Goncharov,Christopher Dainty,Istvan Andorko,Peter Corcoran
申请号：
US15053863
公开号：
US10467469B2
申请日:
2016.02.25
申请国别(地区):
US
年份:
2019
代理人:
摘要：
An optical system for an image acquisition device comprises an image sensor comprising an array of pixels including pixels sensitive to IR wavelengths for acquiring an image. A lens assembly includes a collecting lens surface with an optical axis, the lens assembly being arranged to focus IR light received from a given object distance on the sensor surface. The lens assembly includes at least a first reflective surface for reflecting collected light along an axis transverse to the optical axis so that a length of the optical system along the optical axis is reduced by comparison to a focal length of the lens assembly.
