Sineimage YE0121 Sector Star Test Chart (72 cycles)
The YE0121 test chart is designed for the adjustment of camera
lenses and checking back focal distance. It shows a 72 sector
Siemens star on a white background.
The YE0121 test chart is designed for adjustment of camera lenses checking back focal distance.
With the aid of a low transmission filter and by means of low level
lighting make sure that the camera is not over modulated with the
aperture in the open position.
- Optical focus: Adjust focus of zoom lens at greatest focal length.
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- Back focal distance (lens): Adjust focus at shortest focal length
by regulating lens mechanically with adjustment screw and optimize
alternatively with a).
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- Back focal distance (pick-up tubes): If focus varies from channel
to channel between greatest and shortest focal length, the
individual pick-up tubes must be adjusted mechanically in the
optical axis.
- Select white channel. Set optical focus at greatest focal length.
With shortest focal length and divergent focus adjust the pick-up
tube in W-channel until optimum focus is achieved. If necessary
optimize by alternating with optical focus adjustment.
- With unchanged optical focus adjustment and shortest focal length
adjust the red and blue pick- up tube until optimum focus is
achieved. Image focus (focus adjustment) is maintained at all focal
lengths (zoom-in) and constant distance from object by means of
back focal distance adjustment.
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Standard Transparent/Reflectance Test Chart Size
| Size | Picture size(4:3) | Picture size(16:9) | Chart Size(16:9) |
| A280 | 280*210mm | 280*157.5mm | 365*305mm |
| D240 | 240*180mm | 240*135mm | 320*290mm |
| D280 | 280*210mm | 80*157.5mm | 360*280mm |
- ISO 12233 Resolution Test Chart Size
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| Model | Specification | Size | Material |
| NQ-10-50A | 0.5X | 10x17.8 cm | photographic paper |
| NQ-10-100A | 1X | 20x35.6 cm | photographic paper |
| NQ-10-200A | 2X | 40x71.1 cm | photographic paper |
| NQ-10-400A | 4X | 80x142.2 cm | photographic paper |
| NQ-10-800A | 8X | 160x284.4 cm | photographic paper |
Remark: We support Any customized test charts only if you have high
resolution image and size.
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