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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
This Sector Star Test Chart (72 cycles) Instrument are Certified with
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1 Years Warranty (Additional support period of 3 years)

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

You can choose a colorimters depending on the substrate you are measuring the color of, whether it is opaque, translucent or transparent. In short, you can consider the following factors for choosing the right 3NH colorimeter for your needs: Sample Opacity, Physical Form, Optical Properties needed, Measurement Methods required, Scales and Indices needed, Instrument Standards Conformance (ASTM/ISO/Other), Instrument Geometry, Instrument Performance, Location (laboratory, portability, in-process) and Sample Handling requirements.

By systematically addressing these factors, you can select a colorimeter that optimizes accuracy, efficiency, and value for your specific application.Learn more from our ultimate guide on colorimeter selection. If unsure, consult the 3NH manufacturer for personalized recommendations based on your sample and workflow.


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

A paint gloss meter is used to measure the level of paint gloss, whereby it reflects light at some angles, such as 20°, 60°, or 85° angles, and measures the intensity of that light. To measure surface sheen, the level of gloss is compared to standards that are calibrated and reported in units of gloss (GU).


Yes, 3nh has a wide sales and service network worldwide, we provide overseas service through our authorized distributors or service partners located in Western Europe, Northern and Southern America, and the Asia-Pacific. 


Who are we? Threenh Technology: 22-Year Professional Color Measurement Solution Provider

Threenh Technology is a Chinese professional manufacturer with 22 years of industry experience, specializing in the field of color measurement and surface gloss detection. Integrating research and development, design, production, marketing, and sales, the company takes technological innovation as its core and is committed to providing global customers with high-precision and intelligent testing instruments as well as professional solutions.


Yes, we can offer Spectrodensitometer quality certification issued by our lab free of charge, or issued by third-party international inspection Organizations with extra charge, please contact us for confirmation.

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