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| When direct imaging in front of the camera, like imaging a Macken Plate, or 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. |
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A - Total length of spacers added to system
B - Detector to Lens spacing. Distance 'A' plus the
CCD inset for the camera type
C - Lens to Object spacing
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. |
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| Ordering Information |
| 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 |
| 4mm spacer |
Screw on spacer to add 4mm spacing to optical system |
SSPG01698 |
| 5mm spacer |
Screw on spacer to add 4mm spacing to optical system |
SPG02106 |
| 8mm spacer |
Screw on spacer to add 8mm spacing to optical system |
SPG02067 |
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CCTV lens for front imaging through glass or reflected surface