USAF1951 Test Targets
USAF1951 Test Targets for Machine Vision｜Oklab
  • USAF1951 Test Targets
  • USAF1951 Test Targets for Machine Vision｜Oklab
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USAF1951 Test Targets Blue Chrome on Quartz Glass for Machine Vision and Imaging System

$118.00 USD
$158.00 USD
Pattern
Style
Over Size

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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 Element 1
LTU-025-(0-9,1)-NG> Quartz Glass Blue Chrome 25x25mm/1" Negative 1.6mm Group 0 Element 1 to Group 9 Element 1
LTU-025-(0-9,6)-PG Quartz Glass Blue Chrome 25x25mm/1" Positive 1.6mm Group 0 Element 1 to Group 9 Element 6
LTU-025-(0-9,6)-NG Quartz Glass Blue Chrome 25x25mm/1" Negative 1.6mm Group 0 Element1 to Group 9 Element 6
LTU-050-(0-9,1)-PG Quartz Glass Blue Chrome 50x50mm/2" Positive> 1.6mm Group 0 Element1 to Group 9 Element 1
LTU-050-(0-9,1)-NG Quartz Glass Blue Chrome 50x50mm/2" Negative 1.6mm Group 0 Element1 to Group 9 Element 1
LTU-050-(0-9,6)-PG Quartz Glass Blue Chrome 50x50mm/2" Positive 1.6mm Group 0 Element1 to Group 9 Element 6
LTU-050-(0-9,6)-NG Quartz Glass Blue Chrome 50x50mm/2" Negative 1.6mm Group 0 Element1 to Group 9 Element 6
LTU-076-(-2-9,1)-PG Quartz Glass Blue Chrome 76x76mm/3" Positive 1.6mm Group -2 Element1 to Group 9 Element 1
LTU-076-(-2-9,1)-NG Quartz Glass Blue Chrome 76x76mm/3" Negative 1.6mm Group -2 Element1 to Group 9 Element 1
LTU-076-(-2-9,6)-PG Quartz Glass Blue Chrome 76x76mm/3" Positive 1.6mm Group -2 Element1 to Group 9 Element 6
LTU-076-(-2-9,6)-NG Quartz Glass Blue Chrome 76x76mm/3"> Negative 1.6mm Group -2 Element1 to Group 9 Element1 6

 

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

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 MIN / MAX Overall Size
 Min: 4x4 mm; 
Thickness: 40μm (White & Smooth Coating on the Back Side) Max: 800x960mm (±0.1mm)
Positive / Negative Positive: Opaque Pattern, Clear Background. Negative: Clear Pattern, Opaque Background. Target Shape Square

 

USAF 1951 Test Target Manufacturing: Step-by-Step Production Process

Minimum Line/space

Low Reflectivity Quartz Glass

Key Insight:
Blue Chrome exhibits the lowest reflectivity in the 640-740 nm wavelength range, dropping to nearly 0% reflectivity

Note: Graph shows comparative reflectivity (%) of Bright Chrome, Brown Chrome, and Blue Chrome across 440-1040 nm wavelength range.

 

Positive / Negative

 Positive: Dark pattern on transparent background  Negative: Transparent pattern on dark background

Superior Light Transmission

Soda Lime Glass (Float Silica): Transmission Rate >90% at 550nm

https://img-va.myshopline.com/image/store/1640253952114/-02-7.png?w=750&h=799

Quartz Glass (Fused Silica): Transmission Rate >95% at 550nm

Thermal Expansion Coeff 

Glass expands when heated and contracts when cooled

Note: Quartz glass offers approximately 14× greater dimensional stability under temperature changes

Substrate Material of Glass Soda Lime Glass (Float Glass) Quartz Glass (Fused Silica)
Thermal Expansion Coeff  (20-200 ℃) <8.0x10 -6/K <5.0x10-7 /K
Expansion Ratio (20-200 ℃) 0.00085％ 0.00006％
Real-World Impact 1m glass changes by 8.5μm per 1°C 1m glass changes by 0.6μm per 1°C
Temperature Stability Standard stability 14x more stable
Best Applications General-purpose testing Precision measurement systems 

Surface Flatness Comparison

Note: Quartz glass consistently delivers 5-10× better surface flatness across all size ranges, making it ideal for precision optical applications.

Glass Type Soda Lime Glass
(Standard Float Glass)		 Quartz Glass
(Fused Silica)
Small Samples
Surface Deviation		 <5μm (for sizes under 100mm) <1μm (for sizes under 50mm)
Medium Samples
Surface Deviation
<20μm (for sizes under 200mm)
 <2μm (for sizes under 100mm)
Large Samples
Surface Deviation		 <50μm (for sizes over 200mm) <5μm (for sizes over 100mm)

 

Ultra-Smooth Surface

 
Surface Roughness: Less than 25 nanometers
Note: Diagram shows microscopic surface profile with maximum height variations under 25nm
 

Our precision-polished quartz glass features an exceptionally smooth surface with microscopic variations of less than 0.025μm (25nm) - approximately 2,000 times thinner than a human hair.

This near-perfect surface quality ensures:
  • Superior optical performance
  • Minimal light scatter
  • Optimal coating adhesion
  • Exceptional image clarity

Diagram shows microscopic surface profile with maximum height variations under 25nm

 

Precision Thickness Options

Available in multiple thicknesses to suit your application requirements

  • 1.6mm - Ultra-thin for compact designs
  •  2.3mm - Standard precision applications
  • 3.0mm - Enhanced durability
  • 4.8mm - Maximum stability for demanding environments

All options feature precision-ground edges and uniform thickness across the entire surface

 

Dimensional Range

From micro to macro - our quartz glass substrates are available in virtually any size you need:

  • Maximum dimensions: 800×960mm
  • Minimum dimensions: 4×4mm

Custom sizes and shapes available upon request

Density Measurement

Precision Laser Cutting Custom Shapes Made Easy

From simple to complex designs, our laser cutting technology delivers exactly what you need.

Corner | Chamfer | Hole | Round | Oval
 

Custom Services

Free CAD Conversion 

Our engineers will convert your drawings to digital format at no cost.

Certified Quality

Independent third-party certification available upon request. 

No Minimum Order

Single-piece orders welcome – no quantity requirements.

Quick Turnaround 

Custom production completed in just 5-10 business days.

Precision Backlighting for Glass Calibration Targets

Our backlighting system features:

  • Large illumination area: 2.1 × 1.4 m
  • Superior uniformity: 95%
  • Dual-spectrum capability: IR and visible light
  • High brightness output
  • Ultra-slim profile
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