Shenzhen ThreeNH Technology Co., Ltd.
Shenzhen ThreeNH Technology Co., Ltd Since 1998, 3nh has been a professional factory with 20 years experience on color and glossy measurement industry.
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The target is high contrast transparency containing group 0 to 7 on a 35 mm film. The single patterns in the groups are based on 3 black bars on white ground. These pattern are existing in horizontal and in vertical direction. The structure corresponds to the USAF 1951 standard.
The frequencies are listed in the table below.
| Group Number | 0 | 1 | 2 | 3 | ||||
|
Element |
Linepair / mm |
equivalent Ppi |
Linepair / mm |
Equivalent Ppi |
Linepair / mm |
equivalent Ppi |
Linepair / mm |
equivalent Ppi |
| 1 | 1,00 | 50,80 | 2,00 | 101,60 | 4,00 | 203,20 | 8,00 | 406,40 |
| 2 | 1,12 | 56,90 | 2,24 | 113,79 | 4,49 | 228,09 | 8,98 | 456,18 |
| 3 | 1,26 | 64,01 | 2,52 | 128,02 | 5,04 | 256,03 | 10,10 | 513,08 |
| 4 | 1,41 | 71,63 | 2,83 | 143,76 | 5,66 | 287,53 | 11,30 | 574,04 |
| 5 | 1,59 | 80,77 | 3,17 | 161,04 | 6,35 | 322,58 | 12,70 | 645,16 |
| 6 | 1,78 | 90,42 | 3,56 | 180,85 | 7,13 | 362,20 | 14,30 | 726,44 |
| Group Number | 4 | 5 | 6 | 7 | ||||
|
Element |
Linepar / mm |
equivalent Ppi |
Linepar / mm |
equivalent Ppi |
Linepar / mm |
equivalent Ppi |
Linepair / mm |
Equivalent Ppi |
| 1 | 16,00 | 812,80 | 32,00 | 1625,60 | 64,00 | 3251,20 | 128,00 | 6502,40 |
| 2 | 17,95 | 911,86 | 36,00 | 1828,80 | 71,80 | 3647,44 | 144,00 | 7315,20 |
| 3 | 20,16 | 1024,13 | 40,30 | 2047,24 | 80,60 | 4094,48 | 161,00 | 8178,80 |
| 4 | 22,62 | 1149,10 | 45,30 | 2301,24 | 90,50 | 4597,40 | 181,00 | 9194,80 |
| 5 | 25,39 | 1289,81 | 50,80 | 2580,64 | 102,00 | 5181,60 | 203,00 | 10312,40 |
| 6 | 28,50 | 1447,80 | 57,00 | 2895,60 | 114,00 | 5791,20 | 228,00 | 11582,40 |
About Us:
Contact Information:
Contact Person: Clara Liu;
Email: L001@3nh.com;
Wechat & Whatsapp ID: +8613510310267;
Skype: clara.3nh