Product Specification
Pattern				Substrate Material
Production Process	Laser Writing			Substrate Material of Glass	Soda Lime Glass (Float Glass)		Quartz Glass (Fused Silica)
Minimum Line/space	1μm / 0.7μm			Transmission (@550nm)	>90%		>95%
Feature Accuracy Overall Accuracy	±1μm			Thermal Expansion Coeff (20-200 ℃)	<80X10⁻⁷/K		<5.0x10⁻⁷/K
Coating Type	Bright Chrome (High Reflective)	Brown Chrome (Usual)	Blue Chrome (Low Reflective)	Expansion Ratio (20-200 ℃)	0.00085％ (8.5μm/℃ of 1m)		0.00006％ (0.6μm/℃ of 1m)
Reflectivity	< 66% @550nm	<6% @550nm	< 13.4% @550nm	Surface Flatness	<5μm (Dimension<100mm)		<1μm (Dimension<50mm)
	< 73% @650nm	< 17% @650nm	< 1.8% @650nm		<20μm (Dimension<200mm)		<2μm (Dimension<100mm)
	< 68% @750nm	< 23% @750nm	< 2.67% @750nm		<50μm (Dimension>200mm)		<5μm (Dimension>100mm)
Coating Thickness	120nm (±0.20nm)	100nm (±0.20nm)	120nm (±0.20nm)	Surface Roughness	<0.025μm
Optical Density OD	>3	>3	>4.5	Thickness	1.6mm (±0.3mm)	2.3mm (±0.3mm)	3.0mm (±0.3mm)	4.8mm (±0.3mm)
White Background	Minimum Line/space: 10μm, Thickness: 40μm (White & Smooth Coating on the Back Side)			MIN / MAX Overall Size	MIN: 4x4mm, MAX: 800x960mm (±0.1mm)
Positive / Negative	Positive: Opaque Pattern, Clear Background. Negative: Clear Pattern, Opaque Background.			Overall Shape	Any Shape by Laser Cutting	Square	Oval	Round
Frosted Glass on the Back	Frosted glass on the back are on request.			Special-shaped	Hole	Chamfer	Angle	Corner

Custom Service
Digitalize Drawing	Our engineers would help you digitize the drawing for free.	Customization Production Days	5-10 Working Days
Third Party Certification	Available	Matchable Backlight	Provide matchable backlight for glass targets.

• Cutting is accurate, tolerance ±0.01mm.
• Can cut any shape.
• Can cut a 0.1mm hole.
• High yield to make sure the delivery is on time.

Custom Chrome on Glass Test Calibration Targets / Charts / Masks