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  • USAF1951 Test Targets
  • USAF1951 Test Targets
  • USAF1951 Test Targets
  • USAF1951 Test Targets
  • USAF1951 Test Targets
  • USAF1951 Test Targets
  • USAF1951 Test Targets
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USAF1951 Test Targets for Machine Vision｜Oklab

$118.00 USD $158.00 USD Save $40.00 USD
Shipping calculated at checkout.

A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the u.s. Air ForceMIL-STD-150A standard of 1951.
The ful standard pattern consists of 9 arouns, with each aroup,consistina of 6 elements: thus there are 54 targetelements provided in the full series. The series of elements spans the range of resolution of the unaided eye, down to thediffraction
Pattern
Style
Over Size
Quantity
USAF1951 Test Targets USAF1951 Test Targets USAF1951 Test Targets USAF1951 Test Targets USAF1951 Test Targets USAF1951 Test Targets USAF1951 Test Targets

Description

Standard Item You Can Choose

Model
Material
Coating Type
Over size
Positive/
Negative
Thickness
Pattern
LTU-025-(0-9,1)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,1)-NG
Quartz Glass
Blue Chrome
25x25mm/1"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,6)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,6)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,1)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,1)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,6)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,6)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-076-(-2-9,1)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Positive
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,1)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Negative
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,6)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Positive
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,6)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Negative
1.6mm
Group -2 Element1 to Group 9 Element1

 

Specification

Product Specification
Pattern Info Substrate Material Info
Production Process Laser Writing Substrate Material 
of Glass		 Quartz Glass (Fused Silica)
Minimum Line/space 1μm / 0.55μm Transmission 
(@550nm)		 >95%
Feature Accuracy & 
Avarage Accuracy		 ±1μm Thermal Expansion Coeff 
(20-200 ℃)		 <5.0x10⁻⁷/K
Coating Type Blue Chrome (Low Reflective) Expansion Ratio
(20-200 ℃)		 0.00006％(0.6μm/℃ of 1m)
Reflectivity < 13.4% @550nm Surface Flatness <0.55μm (Dimension<50mm) 
< 1.8% @650nm <2μm (Dimension<100mm) 
< 2.67% @750nm <5μm (Dimension>100mm) 
Coating Thickness 120nm (±0.20nm) Surface Roughness <0.025μm
Optical Density OD >4.5 Thickness 1.6mm  (±0.3mm)
White Background Minimum Line/space: 10μm, Thickness: 40μm
 (White & Smooth Coating on the Back Side)		 MIN / MAX 
Overall Size

Min: 4x4mm;

Max: 800x960mm
(±0.1mm)
Positive / Negative
  • Positive: Opaque Pattern, Clear Background.
  • Negative: Clear Pattern, Opaque Background. 
 Target Shape Square

 

Number of line pairs per millimeter (lp/mm) in USAF Resolving Power Test Target 1951
  Group Number
Element -2 -1 0 1 2 3 4 5 6 7 8 9
1 0.250 0.500 1.00 2.00 4.00 8.00 16.00 32.0 64.0 128.0 256.0 512.0
2 0.281 0.561 1.12 2.24 4.49 8.98 17.96 35.9 71.8 143.7 287.4 574.7
3 0.315 0.630 1.26 2.52 5.04 10.08 20.16 40.3 80.6 161.3 322.5 645.1
4 0.354 0.707 1.41 2.83 5.66 11.31 22.63 45.3 90.5 181.0 362.0 724.1
5 0.397 0.794 1.59 3.17 6.35 12.70 25.40 50.8 101.6 203.2 406.4 812.7
6 0.445 0.891 1.78 3.56 7.13 14.25 28.51 57.0 114.0 228.1 456.1 912.3

 

Width of a line in micrometers(μm) in USAF Resolving Power Test Target 1951
  Group Number
Element -2 -1 0 1 2 3 4 5 6 7 8 9
1 2000.00 1000.00 500.00 250.00 125.00 62.50 31.25 15.63 7.81 3.91 1.95 0.98
2 1781.80 890.90 445.45 222.72 111.36 55.68 27.84 13.92 6.96 3.48 1.74 0.87
3 1587.40 793.70 396.85 198.43 99.21 49.61 24.80 12.40 6.20 3.10 1.55 0.78
4 1414.21 707.11 353.55 176.78 88.39 44.19 22.10 11.05 5.52 2.76 1.38 0.69
5 1259.92 629.96 314.98 157.49 78.75 39.37 19.69 9.84 4.92 2.46 1.23 0.62
6 1122.46 561.23 280.62 140.31 70.15 35.08 17.54 8.77 4.38 2.19 1.10 0.55

 

 

  • Description

Standard Item You Can Choose

Model
Material
Coating Type
Over size
Positive/
Negative
Thickness
Pattern
LTU-025-(0-9,1)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,1)-NG
Quartz Glass
Blue Chrome
25x25mm/1"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,6)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-025-(0-9,6)-PG
Quartz Glass
Blue Chrome
25x25mm/1"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,1)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,1)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,6)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Positive
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-050-(0-9,6)-PG
Quartz Glass
Blue Chrome
50x50mm/2"
Negative
1.6mm
Group 0 Element1 to Group 9 Element1
LTU-076-(-2-9,1)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Positive
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,1)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Negative
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,6)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Positive
1.6mm
Group -2 Element1 to Group 9 Element1
LTU-076-(-2-9,6)-PG
Quartz Glass
Blue Chrome
76x76mm/3"
Negative
1.6mm
Group -2 Element1 to Group 9 Element1

 

Specification

Product Specification
Pattern Info Substrate Material Info
Production Process Laser Writing Substrate Material 
of Glass		 Quartz Glass (Fused Silica)
Minimum Line/space 1μm / 0.55μm Transmission 
(@550nm)		 >95%
Feature Accuracy & 
Avarage Accuracy		 ±1μm Thermal Expansion Coeff 
(20-200 ℃)		 <5.0x10⁻⁷/K
Coating Type Blue Chrome (Low Reflective) Expansion Ratio
(20-200 ℃)		 0.00006％(0.6μm/℃ of 1m)
Reflectivity < 13.4% @550nm Surface Flatness <0.55μm (Dimension<50mm) 
< 1.8% @650nm <2μm (Dimension<100mm) 
< 2.67% @750nm <5μm (Dimension>100mm) 
Coating Thickness 120nm (±0.20nm) Surface Roughness <0.025μm
Optical Density OD >4.5 Thickness 1.6mm  (±0.3mm)
White Background Minimum Line/space: 10μm, Thickness: 40μm
 (White & Smooth Coating on the Back Side)		 MIN / MAX 
Overall Size

Min: 4x4mm;

Max: 800x960mm
(±0.1mm)
Positive / Negative
  • Positive: Opaque Pattern, Clear Background.
  • Negative: Clear Pattern, Opaque Background. 
 Target Shape Square

 

Number of line pairs per millimeter (lp/mm) in USAF Resolving Power Test Target 1951
  Group Number
Element -2 -1 0 1 2 3 4 5 6 7 8 9
1 0.250 0.500 1.00 2.00 4.00 8.00 16.00 32.0 64.0 128.0 256.0 512.0
2 0.281 0.561 1.12 2.24 4.49 8.98 17.96 35.9 71.8 143.7 287.4 574.7
3 0.315 0.630 1.26 2.52 5.04 10.08 20.16 40.3 80.6 161.3 322.5 645.1
4 0.354 0.707 1.41 2.83 5.66 11.31 22.63 45.3 90.5 181.0 362.0 724.1
5 0.397 0.794 1.59 3.17 6.35 12.70 25.40 50.8 101.6 203.2 406.4 812.7
6 0.445 0.891 1.78 3.56 7.13 14.25 28.51 57.0 114.0 228.1 456.1 912.3

 

Width of a line in micrometers(μm) in USAF Resolving Power Test Target 1951
  Group Number
Element -2 -1 0 1 2 3 4 5 6 7 8 9
1 2000.00 1000.00 500.00 250.00 125.00 62.50 31.25 15.63 7.81 3.91 1.95 0.98
2 1781.80 890.90 445.45 222.72 111.36 55.68 27.84 13.92 6.96 3.48 1.74 0.87
3 1587.40 793.70 396.85 198.43 99.21 49.61 24.80 12.40 6.20 3.10 1.55 0.78
4 1414.21 707.11 353.55 176.78 88.39 44.19 22.10 11.05 5.52 2.76 1.38 0.69
5 1259.92 629.96 314.98 157.49 78.75 39.37 19.69 9.84 4.92 2.46 1.23 0.62
6 1122.46 561.23 280.62 140.31 70.15 35.08 17.54 8.77 4.38 2.19 1.10 0.55

 

 

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