Technical Details of Resolution Test Target
| Product | Film | |
| Pattern | Production Process | Laser Drawing |
| Minimum Line/space | 15μm / 30μm | |
| Feature Accuracy | ±10μm | |
| Coating | Silver Bromide | |
| Coating Thickness | 5μm | |
| Optical Density OD | 100% Black 4-4.5 （OD are on request） |
|
| Color Selection | Black, Gray Scale, Gradients(Moire pattern is unavoidable). |
|
| Film Base | Application | For backlight illumination/ transmission illumination applications |
| Expansion Coeff | 18μm/℃ of 1m | |
| The film contract with heat and expand with cold. | ||
| When the relative humidity is constant, the film with a length of 1m will change by 18μm when the temperature changes by 1℃. | ||
| Transmission (400~700nm) |
>83% | |
| Film Base Thickness | 0.175mm / 0.1mm (±0.01mm) |
|
| MAX Size | 1x1m (±0.1mm) (Min Line 15μm) 1.3x2.6m (±0.1mm) (Min Line 30μm) |
|
| Waterproof | Waterproof | |
| Overall Shape | Straight Edge Cutting / Round Hole Hollowing by Laser Cutting | |
| Custom Service | Digitalize Drawing | Our engineers would help you digitize the drawing for free. |
| Matchable Backlight | Provide matchable backlight for film targets. | |
| Test Report by OKLAB | Available | |
| Customization Production Days | 3 Working Days | |
| Customization Quantity | Customization MOQ is 1 pcs. | |
Custom Service of Film Calibration Charts
Production Process of Resolution Test Target
| Coating Type | |
| Type |
Optical Magnification: 10X
|
| Silver Bromide | |
| Coating Thickness | 5μm |
| Optical Density OD | 100% Black 4-4.5 （OD are on request） |
| Color Selection | Black, Gray Scale, Gradients(Moire pattern is unavoidable). |
| Production Process | Laser Drawing |
| Minimum Line/space | 15μm / 30μm |
| Feature Accuracy Overall Accuracy |
±10μm |
|
• Cutting is accurate, tolerance ±0.01mm. |
 |
Product photograph of Resolution Test Target
FAQ of Resolution Test Target
1. What coating is used on this resolution test target?
The target uses a 5 µm silver-bromide coating produced by laser drawing. An optical resolution target can be specified with an OD of 4–4.5 for fully black areas, providing very low transmission and strong contrast under backlight illumination.
2. Why does this resolution test target require backlight illumination?
The film base provides more than 83% transmission across 400–700 nm and is designed for transmitted-light testing. A uniform backlight helps an image resolution test chart maintain consistent brightness and contrast across the complete imaging area.
3. Can this resolution test target include grayscale and gradient patterns?
Yes. Black, grayscale and gradient patterns are available. When a resolution test chart contains fine gradients, interaction between the target pattern and camera pixels may produce moiré. The design should therefore be tested at the intended magnification and working distance.
4. How does target size affect the minimum feature of this resolution test target?
A size up to 1 × 1 m supports a minimum feature of 15 µm, while the 1.3 × 2.6 m format supports a minimum feature of 30 µm. When specifying a large resolution target, the required size and smallest feature must be evaluated together. The listed feature accuracy is ±10 µm.
5. Which film thickness should be selected for this resolution test target?
The available film thicknesses are 0.1 mm and 0.175 mm, both with a tolerance of ±0.01 mm. The thicker option is easier to handle and keep flat, while the thinner option fits compact assemblies more easily but requires better surface support.
6. Can this resolution test target be laser-cut into custom shapes?
Yes. The film supports straight-edge cutting, custom outlines and round-hole cutting. Laser-cutting tolerance is ±0.01 mm, and holes as small as 0.1 mm can be produced. Keep critical test patterns away from the cutting edge and mounting holes.