Sapphire Optical Window Optical LED Lenses for Instrument Glass Watch Crystal Manufactory Fabrication is a display / touchscreen cover glass made from Optical Glass. Listed geometry: diameter 1mm-500mm, cylindrical shaped lens shape. Optical / electrical data: transmittance >95%. Coating: UV; surface quality 40/20;60/40; flatness 1/4 Lambda. It is used in Optical. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
Material
Optical Glass
Type
Concave Lens
Shape
Cylindrical Shaped Lens
Diameter
1mm-500mm
Transmittance
>95%
Coating
UV
Surface Quality
40/20;60/40
Usage
Optical
Lenses Color
Clear
Coat
Anti-Reflective (Ar) Coatings
Clear Aperture: >90% of Diameter
>90% of Diameter
Surface Flatness
1/4 Lambda
Specifications
Diameter (Φmm)
Clear Aperture
>90% of Diameter: >90% of Diameter
Supplier
Jiaozuo Commercial Finewin Co., Ltd.
Technical data
Product name
industrial sapphire wafer
sapphire optical lens chemical formula
AL2O3
Crystal structure
Hexagonal
Hardness Mohs
9H
Compressvise strength
Gpa 2.0
Density(20ºC)
3.98g/cm
Fusion point
2040ºC
Boiling point
2980ºC
Coefficient of Thermal Expansion
α=5.8×10 -6 /K
Specific heat
0.418W.s/g/k
Optical transmission range
0.17-5.5μm
Transmission(0.3~5um)
85-88%
Refractive index
no=1.768nd
ne=1.76nd
Permittivity
11.5(//c), 9.3(⊥c)
Diameter (Φmm)
8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0
Thickness (mm)
0.5, 1.0, 2.0
Diameter Tolerance (mm)
+0.0/-0.2 (General), +0.0/-0.1 (High Precision)
Thickness Tolerance (mm)
±0.2 (General), ±0.05 (High Precision)
Clear Aperture
>75% (Small Size), >90% (Large Size)
Parallelism
3 min. (General), 10 sec. (High Precision)
Surface Quality: Scratch/Dig
80/50 (General), 40/20 (High Precision)
Bevel (face width x 450)
<0.25mm
Coating
Upon customer's request
Refractive index (nd)
1.768
Coefficient of dispersion (Vd)
72.2
Density (g/cm3)
3.97
TCE(μm/mºC)
5.3
Soften Temperature(ºC)
2000
Knoop hardness(kg/mm2)
2200
What to specify when you request a quote
Glass type and thickness — listed as “Optical Glass”; name the glass (soda-lime, aluminosilicate, borosilicate) and thickness.
Strengthening — state thermal tempering or chemical strengthening and the required surface compression or impact rating.
Printing and coatings — listed as “UV”; list silk-screen colours, windows, and any AR / AG / AF coating.
Outline and edges — listed as “Cylindrical Shaped Lens”; send a drawing with cut-outs, holes and edge finish.
Optical requirements — listed as “>95%”; give transmission, haze or gloss targets for the viewing area.
What is the Sapphire Optical Window Optical LED Lenses for Instrument Glass Watch Crystal Manufactory Fabrication made of? expand_more
It is listed as Optical Glass. Coating: UV. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.
What sizes and thicknesses are available? expand_more
The listing gives diameter 1mm-500mm. Custom outlines and thicknesses are made to drawing; state the tolerance you need.
What optical or electrical performance does it have? expand_more
Listed values: transmittance >95%. Confirm the values at your operating wavelength, angle and temperature when you request a quote.
Where is this display / touchscreen cover glass used? expand_more
Listed applications: Optical.
What should I include in a quote request? expand_more
Include glass type and thickness, strengthening, printing and coatings, outline and edges and optical requirements, plus quantity and a drawing if the part is custom.
Configure in 3D, draw in 2D
3D Model & 2D Drawing Builder
PRECISION GLASS3D
3D Precision Glass ConfiguratorBuild a visual 3D preview for custom precision glass parts, including wafers, microfluidic chips, coated glass, optical filters, and machined quartz plates.This tool is for visual configuration only. Final dimensions, tolerances, materials, coatings, and manufacturability will be reviewed from your drawing or specification.
Paste a configuration JSON (from Export) or a copied RFQ summary. The product and all recognized parameters are applied automatically; unknown parameters are listed and skipped.
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LED / OLED Cover Glass Builder
Interactive visual preview for custom precision glass configuration.
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SUBMIT RFQ — ENGINEERING REVIEWYour current 3D configuration and specification summary are attached automatically. Attach a drawing if you have one.
FREQUENTLY ASKED QUESTIONSWhat machined features can be added to cover glass?
Edge grooves, a center cavity or an edge step for module packaging, each with adjustable width and depth. Functional coatings such as AR, anti-fingerprint, ITO or a black border print are also available.
Which edge finishes are supported?
As-cut, ground, polished or C-chamfer. The preview color-codes the edge and shows a double line for a C-chamfer.
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