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Sector Star Test Chart (72 cycles)

Sector Star Test Chart (72 cycles) Instructions Operating Manual Sector Star Test Chart (72 cycles) PDF
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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.

  1. Optical focus: Adjust focus of zoom lens at greatest focal length.

  1. Back focal distance (lens): Adjust focus at shortest focal length by regulating lens mechanically with adjustment screw and optimize alternatively with a).

  1. 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.

 

  1. 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.

  2. 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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FAQs About  Other Charts

 Color is measured using devices such as colorimeters, spectrophotometers, and spectroradiometers. Colorimeters are easier and good for simple color quality tests. Whereas spectrophotometers yield detailed spectral information. Hence, suitable for laboratories and industries.

Always a pre-production sample before mass production; Always final Inspection before shipment; 

a. Check whether the USB cable is connected. If not, please connect it. Check whether the connection is effective. You can re-plug the USB cable to test.

b. If the USB cable is connected well but the interface still displays "USB Disconnect", please re-start the colorimeter and enter "Menu" -"Comm"to start the communication.

c. Change the USB cable or change the USB port in you PC.

A powder coated surface is most commonly measured for thickness post curing using a digital coating thickness gauge. This method is non-destructive, helps verify coverage uniformity and meets quality control standards. A powder comb gauge is used to estimate thickness for a pre-cured coating.

Look for dirty or fingerprinted glass along the optical path, recalibrate with standards, and check the set-up for outside light so that it is controlled. If the problems still exist, please reach out to the helpdesk or book a service with your professional service.

Since part of the light will pass through the light-transmitting materials, the colorimeter is not suitable for color measurement of such kinds of materials; however, when place a pure color material with uniform texture under the light-transmitting material, we can measure the color difference between the standard and the sample. 

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