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USAF 1951 Test Target by JD Photo Data

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SL11 Siemens Star Test Target

GB £178.00

SL11 Siemens Star Test Target
High resolution chrome markings 
Transparent glass or white glass

Availability:
In stock
SKU
SL11

Maximum 2000 characters

 

PURPOSE

The Siemens Star Test Target is designed to evaluate the resolution performance and focus precision of optical and imaging systems. It is particularly effective in determining the resolving limit of a system by observing how close to the center adjacent lines can be distinguished. This makes it ideal for camera alignment, lens testing, focus calibration, and image quality analysis. The Siemens pattern's radial geometry is sensitive to optical aberrations, making it useful for applications across machine vision, microscopy, metrology, and sensor evaluation. While primarily a resolution tool, it also aids in calibration tasks such as center alignment and optical axis verification.

 

CONFIGURATION

  • Material: Chrome on Transparent Soda Lime Glass, 1.5mm thick, available as 3" (75mm)
  • Material: Chrome on White Diffuser Glass, 1.25mm thick, available as 4" (100mm)

 

PATTERN DESCRIPTION

Each test plate features a Siemens star pattern with a 2" (50mm) outer diameter and a clear center. Four spoke-count variants are available, offering different angular resolutions. The minimum line width is determined by the central clearance and total number of spokes. These patterns are suitable for assessing camera resolution, lens sharpness, and focus uniformity. Low-resolution PDF previews can be downloaded from the Downloads tab for reference purposes.

  • SL1-1: 36 spokes (10° rotation), 0.15mm central clearance, ~0.006mm minimum spoke width
  • SL1-2: 72 spokes (5° rotation), 0.20mm central clearance, ~0.004mm minimum spoke width
  • SL1-3: 120 spokes (3° rotation), 0.25mm central clearance, ~0.003mm minimum spoke width
  • SL1-4: 314 spokes (≈1.15° rotation), 0.30mm central clearance, ~0.002mm minimum spoke width

 

MATERIAL


Soda Lime Glass
: A cost-effective and optically clear substrate, suitable for most precision imaging applications. Transmits light from 350 nm upward with 88% transmittance between 375–750 nm. Flatness class: 5 µm. Thermal expansion: 93 × 10⁻⁷ K⁻¹.


White Diffuser Glass
: A solid, semi-opaque glass transmitting ~30% of light. Double-side polished for uniformity. Provides near-Lambertian transmission and semi-specular reflection. Ideal for evenly illuminated backlight applications. Flatness class: 2 µm. Optional anti-glare spray coating available.

 

TURNAROUND

Our standard production turnaround is 5 days from receipt of order. Faster delivery options are available upon request.

 

INSPECTION

All photomasks undergo a comprehensive inspection process. Key parameters such as Critical Dimension (CD) and feature uniformity are measured and recorded. High-magnification images (Nikon MM40 at 900×, OGP ZIP 300 at 400×) are stored with production data. For sectors requiring compliance documentation—such as medical or automotive—optional inspection certificates can be included with the order.


Standard:
Full inspection performed; no documentation supplied.

Certificate of Conformance: Confirms compliance with internal inspection standards.

Certificate of Measurement: Up to 10 line/space dimensions (width and pitch) can be measured and documented. CAD or marked drawing may be required. Additional measurements available on request.

 

Please see the TECHNICALDOWNLOAD, and FAQ sections for further information. If you still require clarification, please email us or click for LIVE SUPPORT.

More Information
Specification
FAQ

FREQUENTLY ASKED QUESTIONS

Q: The standard pattern doesn’t match my requirements. Can a custom version be produced?

A: Yes. While the patterns shown are standard configurations, we can produce custom designs based on your specifications. Please note that pricing and lead times will vary depending on complexity and volume.

Q: What is the typical lead time from order to dispatch?

A: We aim to keep these products in stock for immediate dispatch. However, please allow up to 5 working days depending on order volume and current production workload. For urgent requirements, contact us directly to check availability.

Q: Can you provide a high-resolution image or scaled preview of the pattern?

A: Yes. High-resolution graphic previews can be emailed upon request. Please contact us via Live Support or email to receive sample files.

Q: Are other materials available for this product?

A: Yes. Standard versions are produced using low-reflective chrome on soda lime glass, but we can supply alternatives including quartz, Borofloat®, or other substrates. Masking layers such as aluminium, gold, or ITO can also be specified. Minimum order quantities apply for non-standard materials.

Q: Can the glass be supplied in different thicknesses?

A: Yes, alternate glass thicknesses can be supplied on request, subject to material availability and minimum order quantities.

Q: Can I specify exact tolerances or reference dimensions for inspection?

A: Yes. For customers requiring dimensional validation, we offer Certificate of Measurement services. You will need to supply a CAD file or annotated drawing identifying the features to be measured.

Q: Are these slides reusable or suitable for cleaning?

A: The chrome patterns are durable and can be cleaned with appropriate optical cleaning agents. Avoid abrasive materials. Reuse is possible depending on your application and handling practices.

Q: Is there a minimum order quantity?

A: There is no minimum order for standard stock items. For custom designs or non-standard materials, minimum order quantities will apply.

Downloads

 

 

  

 

 

Material Specifications
General
Product Specifications
jpg
(Size: 1.7 MB)
This is a low resolution picture showing the general design layout of one of the layout options. The layout you receive may differ slightly. We will send you a copy of your chosen layout after ordering. The quality of the picture does not represent the final product.

FREQUENTLY ASKED QUESTIONS

Q: The standard pattern doesn’t match my requirements. Can a custom version be produced?

A: Yes. While the patterns shown are standard configurations, we can produce custom designs based on your specifications. Please note that pricing and lead times will vary depending on complexity and volume.

Q: What is the typical lead time from order to dispatch?

A: We aim to keep these products in stock for immediate dispatch. However, please allow up to 5 working days depending on order volume and current production workload. For urgent requirements, contact us directly to check availability.

Q: Can you provide a high-resolution image or scaled preview of the pattern?

A: Yes. High-resolution graphic previews can be emailed upon request. Please contact us via Live Support or email to receive sample files.

Q: Are other materials available for this product?

A: Yes. Standard versions are produced using low-reflective chrome on soda lime glass, but we can supply alternatives including quartz, Borofloat®, or other substrates. Masking layers such as aluminium, gold, or ITO can also be specified. Minimum order quantities apply for non-standard materials.

Q: Can the glass be supplied in different thicknesses?

A: Yes, alternate glass thicknesses can be supplied on request, subject to material availability and minimum order quantities.

Q: Can I specify exact tolerances or reference dimensions for inspection?

A: Yes. For customers requiring dimensional validation, we offer Certificate of Measurement services. You will need to supply a CAD file or annotated drawing identifying the features to be measured.

Q: Are these slides reusable or suitable for cleaning?

A: The chrome patterns are durable and can be cleaned with appropriate optical cleaning agents. Avoid abrasive materials. Reuse is possible depending on your application and handling practices.

Q: Is there a minimum order quantity?

A: There is no minimum order for standard stock items. For custom designs or non-standard materials, minimum order quantities will apply.