The YE0223 is designed for evaluation of the halftone reproduction of electronic cameras. Two 13-graduated counter current gray scales are arranged on a gray background (D = 0.75), the gray scales being graduated logarithmically. Related to the densities of the gray scales: gamma = 0.45, related to the transmission values (brightness): gamma = 2.2, that being exactly the reciprocal value of gamma = 0.45. The output signal of a optimally gamma-corrected camera yields two 13-gratuated counter current linear step signals.
The contrast range of the gray scales is 200 : 1.
The values of the 11-graduated gray scale are as follows:
Step | Density | Reflectance in % |
1 | 0.05 | 89 |
2 | 0.13 | 74 |
3 | 0.21 | 62 |
4 | 0.30 | 50 |
5 | 0.40 | 40 |
6 | 0.51 | 31 |
7 | 0.63 | 23 |
8 | 0.78 | 17 |
9 | 0.95 | 11 |
10 | 1.15 | 7 |
11 | 1.41 | 4 |
12 | 1.77 | 2 |
13 | 2.35 | 0.5 |
The density of the white field between the gray scale is D = 0.05 (reflectance = 89 %).
With 12 rigorous quality inspection processes in place, we ensure a high yield rate of up to 98% for batch processed precision parts.
FAQs About Grayscale Charts
Always a pre-production sample before mass production; Always final Inspection before shipment;
Our machine is packed by standard export wooden box, it won’t be damaged. We’ve delivered many testing machines abroad by sea or by air without damage.
D/8°and 45°/0°are two kinds of illumination geometry with different optical geometry design. D/8°illumination geometry is more widely used for the color comparison and measurement of high-gloss materials; 45°/0°illumination geometry is mainly used in printing and packaging industries.
Threenh Technology with excellent after sale service, Generally, Our warranty is one years(Additional support period of 3 years). Within the warranty period, we can offer technique support and parts to parts change, necessarily, our engineers may go to your place for better support. Our instrument have professional After-sales Dept. lf you have any technical problem or question with our goods welcome to contact us.
Threenh Technology colorimeter is shipped with an operating instructions and video of English version.If you need an electronic version of the user manual, you can download it from our website download center