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Chrome on quartz glass (fused silica)
Description: Good thermal efficiency performance, standard accuracy +/- 1um, best accuracy +/- 0.1um, maximum size 1000x1000mm, smallest line width/ minimum feature size down to 0.7um;

Custom Chrome Graticules, scales, reticles, pin holes, apertures, calibration targets, resolution targets, test targets and others in single pieces and small batches as well as in high-volume serial quantities are on request.
Notes

1. Customization MOQ is 1pcs.

2. Dot Vision directly serves and supports international customers.

3. You can get in touch with our engineers quickly by clicking below Buttom "Inquiry now" "Ask Questions" "Customization"

Custom chrome on quartz glass (fused silica) test&calibration targets: For backlight illumination/ transmission illumination applications

Accuracy
Accuracy of single feature (mm) : Dot diameter, Dot spacing, Square width, Square length, Line width, Line spacing, etc±0.001 / ±0.0001
Accuracy of the overall pattern (mm)
Dimension <= 300mm: ±0.001
Dimension > 300mm:    ±0.001
Accuracy from Chart / Target edge to single chrome feature / pattern (mm)+/-0.05
Minimum feature size (um)
Smallest Dot diameter, Dot spacing, Square width, Square length, Line width, Line spacing, etcDown to 0.7um 
Production Process
Lithography
Geometry
Length / Width (mm)from 1x1mm  to 1000 x 1000mmThickness (mm)1.5 / 2.3 / 3.0 / 5.0mm for options
Dimension Tolerance (mm) ±0.1Thickness Tolerance (mm)±0.1
Edges

Beveled

Angle of the edges
±1°
Coating
Standard Coating Type

Dark Brown Chrome

● Color: Color: First surface / Air side Dark Brown, glass side SILVER;

● First surface Reflectivity<25%@550nm;

● OD (Optical Density) >3;

Custom Coating Type

Blue Chrome-SILVER

●  Color: First surface / Air side BLUE, glass side SILVER;

●  First surface Reflectivity < 5% @680nm;

●  OD (Optical Density) >4;

Blue Chrome-BLUE

●  Color: First surface / Air side BLUE, glass side BLUE;

●  First surface Reflectivity < 5% @680nm;

●  OD (Optical Density) >4;

High Reflective Chrome

●  Color: First surface / Air side SILVER, glass side SILVER;

●  First surface Reflectivity < 65% @436nm;

●  OD (Optical Density) >3;

AR Coating

● AR Coating on appointed side of the reticle;

● AR Coating on both sides of the reticle;

● VAR: single AR coating with custom bandwidth, e.g. 840nm, 940nm;

● BBAR: broadband AR coating, e.g. VIS (420-700nm);

● Reflectivity data after AR coating on request;

Protection layer (Pellicle) above the chrome layer making the chrome pattern more durableOn request
Substrate Properties
Type

Chrome pattern on stable quartz glass / fused silica substrate--suitable for backlight illumination/ transmission illumination applications

Surface QualityScratch:Dig<=40:20
Surface Roughness<0.025umSurface Flatness (um)Dimension <130mm: ~5um;
Dimension 130-220mm: ~10um;
Dimension 220-450mm: ~20um;
Dimension 450-550mm: ~30um;

Refractive index

1.4701@400nm;

1.4585@587nm;

1.4553@700nm;

Transmission (400~700nm)~92% (transmittance can be increased by applying AR coating on glass surface if needed)

Compressive Strength

1100Mpa

Bending Strength / Flexural Strength

67Mpa

Tensile Strength

48Mpa

Poisson's Ratio

0.14-0.17

Young Modulus

72000Mpa

Modulus of rigidity

31000Mpa

Moh's hardness

7

Highest use temperature1100℃
Coefficient of Thermal Expansion (15 to 200 ℃)<5.0*10⁻⁷

Coefficient of Thermal conductivity(°C)

1.47/m°C

Dielectric Constant

3.7-3.9MHz
Thermal Expansion Rate of Substrate


Soda Lime Glass (Float Glass)Quartz Glass (Fused Silica)
TemperatureExpansion Ratio0.00085%0.00006%
In Terms of 1 Meter8.5μm/℃0.6μm/℃
Prons and Cons
DisadvantageIf nice thermal expansion performance is not essential, quatz glass is not recommended because of higher cost compared with soda lime glass/float glassAdvantageWith Low Thermal Expansion Rate: <5.0*10⁻⁷
Customization Details

Custom Pattern

Custom Pattern as customer's own design can be fully realized as long as the smallest feasture size is >=0.7um; e.g. dot grid, checkerboard array, line grid, Charcu grid, crosshair, etc

Positive type (Opaque pattern on clear/transparent background) and Negative type (Clear/transparent pattern on opaque background) are flexible up to customer' option;

Custom Dimension / GeometryLength / Width (mm)from 1x1mm to 1000 x 1000mm flexible
Thickness (mm)1.5 / 2.3 / 3.0 / 5.0mm for options
Irregular shapes are on requestirregular shape customization calibration target.jpg
Mounting / Assembling Holes, Angles, Corners, Protective Chamfers on the calibration&test targets are on requestcustomization.jpg
Custom work on the back side of substrateWhite &smooth coating on the back side of SubstrateAvailable
Custom / Digitalize drawing 

Dot Vision engineers could help you digitize the drawing. Data prep service is included in the targets / charts / reticles.

Matchable Mechanical Protection/Mounting frames are on requrest custom chrome on ceramic target.jpg
3rd Party CertificationAvailable
Matchable&Custom Backlight for Chrome on Quartz Glass Targets / Reticlescustom backlight for chrome on glass calibration taget.jpg


Custom Chrome Graticules, scales, reticles, pin holes, apertures, calibration targets, resolution targets, test targets and others in single pieces and small batches as well as in high-volume serial quantities are on request.


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With guaranteed product quality, all calibration targets are tested using precision measurement instruments before packing and delivery to clients to ensure the accuracy.

Link:

Test report of a Dot Vision calibration target using a GOM 3D inspection system


Dot Vision can provide third party certificate of the accury from feature to feature for the customization product if you require. You can name and require  any feature/position which you want accuracy certification from third party.

Dot Vision use direct write lithography technology to make chrome pattern / chrome mask layer above transparent soda lime glass (float glass) and opaque ceramic substrate to ensure high accuracy.


  • 1. Minimum feature size: Down to 0.7 μm

  • 2. Address grid: Down to 12.5 nm

  • 3. Exchangeable write modes

  • 4. Real-time autofocus system

  • 5. High power DPSS laser with 355 nm wavelength

  • 6. Camera system for metrology and alignment

  • 7. Closed-loop climate chamber

  • 8. Edge detector system


Chrome Mask Production Process.png


Holes/ angles/ corners on the calibration target are available 

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Irregular shapes of calibration target are available

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Coating Types


High Reflective Chrome (Silver): 

Reflectivity<65% @436nm


Low Reflective Chrome (Dark Brown): 

Reflectivity<25% @550nm


Blue Chrome (Blue):  

Reflectivity<5% @632nm

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Reflectivity.jpg

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  • How about customization?

    We are always happy and patient to hear your own ideas about the design of a customised calibration target, MOQ is 1pcs.

  • How can I make payment?

    Paypal, credit card, or bank transfer are all available. 

  • How does Dot Vision make delivery to you?

    Dot Vision use DHL/Fedex/TNT/UPS to make the delivery to international customers from worldwide, no matter you are from Asia, America, or Europe. Normally you can receive package within 3 days, fastest service is in 2 days.

  • Where does Dot Vision serve and support?

    Dot Vision directly serves and supports international customers from worldwide, Asia, America, Europe.

  • Is there initial setup cost for customization?

    Dot Vision makes any customization pattern without extra initial setup cost, besides, Dot Vision offers to design the drawing for you without charge which is within our service.

  • How can I get in touch with Dot Vision immediately?

    You can get in contact with us quickly from the yellow buttoms "Inquiry Now", "Ask Question", "Customization", you can also send us an e-mail via info@dot-vision.com, our engineer will get back to you immediately within 24 hours.

  • How to get customization/ what's the customization procedure?

    1. Selecting the suitable substrate material is the first but also important step in customization, you can refer to this webpage  Select right substrate material to select suitable material, or you are always welcome to discuss with us to select suitable material via  info@dot-vision.com, Dot Vision engineer will come back to you immediately within 24 hours; 

    2. After selecting material, you can send us your drawing via  info@dot-vision.com(PDF, .dwg, .dxf, .jpg files are all fine), Dot Vision engineer will come back to you immediately within 24 hours; 

    if you don't have drawing, Dot Vision engineer could help to design the drawing;

    3. Dot Vision engineering team will make you quotation based on the material and your drawing; 

    4. After order entry, Dot Vision engineers will send you final manufacturing drawing for double confirmation before final manufacturing; 

    5. Customization manufacturing time is within 7 working days after final manufacturing drawing is confirmed;