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Vignetting factor Measurement System KK-2
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It can measure easily for small lens camera, large lens camera and rear projector |
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Measures by "Relative focal plane illuminance" measuring method of JIS standard No.JISB 70996-4-2. |
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A large sized lens -a small lens can be measured. |
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By rotating a large field light source, measurement became possible about the property of a projector lens. |
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| Specifications |
| Light source |
[1] Luminance surface 300x300[mm](Diffused flat light)
[2] Luminance value about 3500[cd/m2]
[3] Color temperature
[4] Uneven luminance value
[5]Average life span 20000 hours
Light source lamp Cold Cathode Fluorescent Lamp
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| Photo detector unit |
[1]Detector Photo diode
(With luminous efficiency correction)
[2]Pinhole diameter 0.1[mm],0.2[mm],0.5[mm]
Max t = 0.15[µm](chromic oxide evaporation)
[3]Range of right and left movement of Photo Detector Amplitude from the center Max ±50[mm]
(Automatic movement by pulse motor)
[4]Right and left movement resolution 0.002[mm]
[5]Angle of rotation degree of Photo Detector Horizontally±45degrees(Adjusts by micrometer)
[6]Top and bottom movement ±5[mm] (Adjusts by micrometer)
[7]Photo Detector front and back movement. From installation aspect of test lens installation jig 10mm-35mm
(Adjusts by micrometer)
[8] Photo Detector base movement Min 200[mm]
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| Main window |
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