Disphotic light spot testing lens hood under strong background environment

The invention discloses a faint light optical pattern measuring lens shade under strong back light that includes rectangle light shielding box, front and back doors are movably installed on the front and back ends of the box. The front door has light through hole, and observing hole. Sliding boards...

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Bibliographic Details
Main Author ZAIHONG HOU
Format Patent
LanguageEnglish
Published 30.08.2006
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:The invention discloses a faint light optical pattern measuring lens shade under strong back light that includes rectangle light shielding box, front and back doors are movably installed on the front and back ends of the box. The front door has light through hole, and observing hole. Sliding boards are installed on the left and downward on the light through hole. The inner surface of the back door has a diffuse reflection screen. Soft light shielding material is adhered around the front door and the back door. The out wall of the case is coated white paint or taken polished finish, inner wall of the case taking black coating or coating non-glisten lacquer. The invention could take 24 hours nonstop faint light optical pattern measuring experiment, and has good effect.
Bibliography:Application Number: CN2006137934