Custom chrome on ceramic test&calibration target: For front light illumination, reflective illumination, natural illumination applications
Accuracy Description
Feature size Accuracy: Dot Diameter, Square/Checker Size, Line Width, etc	±0.003mm	Circularity (Example ➡Go Link)	0.003mm
		Line Straightness	0.003mm
Feature Spacing Accuracy of Any 2 Neighbor Features: Dot Spacing, Chessgrid Corner to Corner Spacing, Line Spacing, etc (Accuracy Definition ➡Go Link)		±0.002mm
Feature Position Accuracy among Entire Pattern Area (Regarding to Ideal Position)--ChessGrid Corner Position, Circle Position, etc (Accuracy Definition ➡Go Link)		0.002mm
Feature Spacing Accuracy of Any 2 Neighbour Features: Dot Spacing, Chessgrid Corner to Corner Spacing, Line Spacing, etc  (Accuracy Definition ➡Go Link)		0.004mm
Accuray of Distance from Chrome Pattern to Target Edge		±0.1mm
3rd Party Certificate of Accuracy ／ Internal Certificate of Accuracy		Available on request (➡Example Link)
Resolution Performance
Minimum feature size (um)
Smallest Dot diameter, Dot spacing, Checker size, Line width, Line spacing, etc		Down to 10.0um
Production Process
Lithography
Geometry Dimension and Tolerance
Length / Width (mm)	from 1x1mm  to 228 x 228mm	Thickness (mm)	0.38mm / 0.635mm / 1.0mm / 1.7mm / 2.0mm in stock for options, gluing with empty PVC / ceramic / aluminum board to increase the thickness is available
Dimension Tolerance (mm)	±0.1mm	Thickness Tolerance (mm)	±0.1mm
Edges	Sharp edge	Angle of the edges	±1°
Surface Roughness	≤0.4um	Surface Flatness (um)	Dimension <100mm: 10-30um
			Dimension 100-127mm: 30~60um
			Dimension 228mm: 60-80um
Chrome Coating Description
Coating Type	Blue Matte Chrome (Reflectivity <5% @632nm ), no pinhole bigger than 0.001mm	Standard Thickness of Chrome Layer (nm)	~120nm
Protection layer (Pellicle) above the chrome layer making the chrome pattern more durable	On request	Coating / Pattern on both sides of the substrate	On request
Good Contrast on NIR Wavelength 850nm, 940nm	On request as sample image
Reflectance Illustration
Substrate Properties
Alumina content	96%	Specific Gravity	≥ 3.6 g/cm3
YOung's modulous	330GPa	Vicker Hardness	14GPa
Compressive Strength	2000MPa	Bending Strength / Flexural Strength	400MPa
Coefficient of Thermal Expansion (CTE) (15 to 200 ℃)	7.2X10-6 / ℃	Manufacturing Temperature	23℃
Coefficient of Thermal Conductivity	18-25W/m.k	Dielectric Constant	9-10MHz
Highest Use Temperature	80℃	Storage Temperature	10-80℃
Type	Chrome on ceramic calibration target--suitable for front light illumination, reflective illumination, natural illumination applications	Matte and diffusive reflectance surface	White or near white reflective material comprising of 96% compacted Alumina. Ceramics are commonly noted for their matte surface quality finish; therefore low reflectivity while retaining a white reflective surface as well as resistance to breakage
Customization Details
Custom Pattern	Custom Patterns as customer's own design can be fully realized as long as the smallest feasture size is >=3.0um;  e.g. dot grid, checkerboard array, line grid, Charcu grid, crosshair, etc Positive type (Dark pattern on white background) and Negative type (White pattern on dark background) are flexible up to customer's option;
Custom Dimension / Geometry	Length / Width (mm)	from 1x1mm  to 228 x 228mm
	Thickness (mm)	0.38 / 1.0 / 2.0mm in stock for options, gluing with empty PVC, ceramic, aluminum board to increase the thickness is available
	Irregular shapes are on request
	Mounting / Assembling Holes, Angles,  Corners, Protective Chamfers on the calibration&test targets are on request
Custom / Digitalize drawing	Dot Vision engineers could help you digitize the drawing. Data prep service is included in the targets / charts / reticles.
Custom Mechanical Protection/Mounting frames are on requrest
Coating / Pattern on both sides of the substrate	Available and on request
Prons and Cons
Advantage	● Highest Feature Position Accuracy ／Highest Resolutuion / Sharp Feature Edge compared with white PET film, UV ink on opauqe substrate, and printing;
	● Matte and diffuse reflectance surface, no glare with on or off front lighting
Disadvantage	● Maximum dimension limited to 228x228mm;  ● Chrome option costs more than high resolution printing / UV ink developing if feature size accuracy +/-2um is not essential;

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.

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

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.

Ø OMM machine used: Hexagon OMM machine with uncertainty Exy= ±(0.6+L/900) um  (Laboratory temerature 20℃, humidity 49%)

Ø OMM measuring 3rd party is accredited in accordance with ISO/IEC 17025:2005 General Requirement for the competence of Testing and Calibration Laboratories

Go Link:

Accuracy performance analysis of a chrome on ceramic Halcon calibration target

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

Holes/ angles/ corners on the calibration target are available

Irregular shapes of calibration target are available

• 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;