CCTV lens for front imaging through glass or reflected surface

CCTV lens for front imaging
When direct imaging in front of the camera, like imaging an image projected onto a defusing surface, like a ground glass plate, it is necessary to reduce the image so that it completely fits onto the CCD chip surface. The 25mm and 50mm CCTV lenses image an object from a given plane in front of the lens onto the CCD while reducing the size. The lens can image such objects at distances from about 10cm in front of the lens (20cm for the 50mm lens) to 1 meter or more depending on the distance from the lens to the camera. The distance from lens to camera depends on the camera type and spacers placed between the lens and the camera.
Description
Specifications
Ordering Info
Catalog/Manual
A - Total length of spacers added to system
B - Detector to Lens spacing. Distance 'A' plus the CCD inset for the camera type
A - Lens to Object spacing CCD inset for Camera Types
CCD inset for Camera Types
C mount (Camera front to CCD = 17.5mm) for nominal lens magnification, use without spacers.
CS mount (Camera front to CCD = 12.5mm) for nominal lens magnification, use 5mm spacer.
SP mount (SP cameras. Camera front to CCD = 4.5mm) for nominal lens magnification, use with 13mm spacers.
 
  Item Description P/N 
         
  25mm focal length CCTV lens kit 25mm focal length lens assembly with locking iris and focus adjustment. Includes 1 ea . 8mm spacer and 2 ea . 5mm spacers SP90085  
         
  50mm focal length CCTV lens kit Same as above except 50mm focal length lens SP90038  
         
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