USAF 1951 Resolution Test Target OTR1951-D1N27
JCOPTIX USAF 1951 resolution targets etch USAF 1951 patterns into chromium coatings on soda-lime substrates to test microscope resolution. USAF 1951 patterns contain groups 0-7 or 2-7, each with 6 elements, reaching 228 lp/mm. Each element has 3 horizontal and vertical lines, effectively preventing false resolution from affecting results. See the Technical Notes tab for details. Contact technical support for customization. USAF 1951 resolution targets. Models: OTR1951-D1P07, OTR1951-D1N07, OR0224R-1951P, OTR1951-D1N27, OTR1951-L1S1P07, OTR1951-L1S1N07, OTR1951-L3S1P27, OTR1951-L3S1N27. Sizes: Ø25.4 mm, 25.4 mm × 25.4 mm, 76.2 mm × 25.4 mm. Positive targets: coated patterns with transmitting backgrounds. Negative targets: transmitting patterns with coated backgrounds. JCOPTIX USAF 1951 patterns contain groups 0-7 or 2-7 with 6 elements each, reaching 228 lp/mm. Positive and negative targets are offered in round Ø25.4 mm or rectangular 25.4 mm × 25.4 mm and 76.2 mm × 25.4 mm sizes. Positive chromium patterns with transparent backgrounds suit reflected-light microscopy; negative transparent patterns with chromium-coated backgrounds suit transmitted-light microscopy.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Pattern Type | USAF 1951 |
| Number of Patterns | 9 |
| Dimensions | Ø25.4 mm |
| Dimensional Tolerance | +0.0/-0.1 mm |
| Substrate Thickness | 1.5 mm |
| Thickness Tolerance | ± 0.2 mm |
| Substrate Material | Soda-Lime Glass |
| Number of Groups | 2-7 |
| Coating Location | Pattern Transmitting, Remaining Area Coated |
| Coating Material | Yellow Chromium |
| Edge | Beveled |
| Surface Flatness | ≤ 15 μm |
| Coating Optical Density [430 nm Test Wavelength] | ≥3 @ 430 nm |
| Surface quality (scratch/dig) | 40/20 |
| Line Width Tolerance | ± 0.3 μm |
Key Features
Datasheet
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