Language
Chinese English español Italiano Giapponese coreano
Home>Main Instruments>Test Charts>Other Charts

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
certify
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.

Our Valued Clients

  • our customer Truly Opto Electronics
  • our customer q tech smart vision
  • our customer Largan Precision
  • our customer TRANSSION
  • our customer oppo
  • huawei
  • our customer lenovo
  • our customer asus

FAQs About  Other Charts

A colorimeter sends light through a solution and measures the amount that is absorbed. It computes the absorbance by comparing the intensity of light before and after passing through. The greater the concentration of the color, the greater is the absorption of the light. It is also possible to quantify the color of the solution.


Yes. However, for LED retrofitting to meet industry standards, color- calibrated LED modules must be used for accurate color rendering. We usually do not recommend customers to modify it themselves, as this can affect the accuracy of the color and cause unnecessary losses


3nh Instrument Recommendation for Translucent Materials

1. YS6002 / YS6002-M Color & Haze Meter

Equipped with d/8° integrating sphere and D/0 transmission structure, it comprehensively tests color difference, haze, transmittance and yellowing index. Ideal for translucent film, frosted glass, milky plastic and liquid samples, perfectly suitable for laboratory and production quality control.

2. KS1500 / KS1510 Color Haze Meter

Adopts large integrating sphere and full-spectrum optical design, delivers stable diffuse transmission data. Specially optimized for thick translucent sheets and high-haze materials, ensuring accurate and consistent color measurement.

3. TS8560 Spectrophotometer

High-precision benchtop model with dual reflection & transmission measurement modes. Supports SCI/SCE detection, with excellent inter-instrument agreement, meeting strict color inspection standards for high-end translucent materials.

4. TS8510 Portable Spectrophotometer

Compact and portable, optional transmission accessory for fast on-site testing of thin translucent samples. Great for factory spot inspection and mobile quality checking.


The machine used to measure color is primarily called a colorimeter or spectrophotometer. 

Spectrophotometer: The most common and precise type. It analyzes light reflected/transmitted by an object across the visible spectrum to quantify color accurately. A spectrophotometer can measure colors on smooth or matte surfaces, as well as textured, glossy, mirror-like surfaces, and special effect colors. It measures the reflected light of a sample at a fixed angle (e.g., 45˚) or captures light reflected at all angles to calculate color measurements that closely match what the human eye perceives. Additionally, similar to how humans flip a sample to view colors from different angles, a spectrophotometer is suitable for measuring a variety of materials and surface characteristics. Widely used in industries like paint, textiles, plastics, Chemicals, Pharmaceuticals, and printing. 

Colorimeter: Also called photoelectric integrating colorimeter, a simpler, more cost-effective option. It measures color based on three primary colors (RGB) and is suitable for basic color matching needs. A photoelectric integrating colorimeter is a color measurement device based on the photoelectric integration principle. It directly measures the tristimulus values XYZ of an object's color using three color filters (red, green, blue) and silicon photocells as three sensors. The color measurement principle of this instrument imitates the human eye's mechanism of perceiving the three primary colors (red, green, blue). It corrects the relative spectral sensitivity of the detector through color filters to match the CIE-recommended spectral tristimulus value functions x(λ), y(λ), and z(λ).

Spectrocolorimeter: Combines the functions of spectrophotometers and colorimeters, offering both spectral data and color space values for comprehensive analysis.

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

Flickering lamps, color shifts, and uneven lighting are common faults, which can be corrected by changing the tubes, cleaning the interiors, and re calibrating the light system.

Related Other Charts You May Also Like

Copyright ©1998 - 2026 Guangdong Threenh Technology Co.,Ltd. Privacy Policy

Give us a call!

Discuss your project with one of our product specialists:

0086 755 26508999

Need pricing?

We respond to quote requests within 1 business day.

service@3nh.com

Already know what you need?

Submit a demo request for the product you're interested in.

Get a Demo
Leave Your Message
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it. Privacy policy