Application: Medical, Optical. Model: yt444.
Overview
Polished Plano Optical Sapphire Crystal Cube Glass Windows for Watch /Protective Sapphire Glass Sheet is a custom precision glass component in Optical Glass (Sapphire substrate). Listed geometry: size Customer's Request. Optical / electrical data: wavelength 0.2 – 5.5 Um, transmittance >95%. Coating: HC; surface quality 60-40 Scratch and Dig; flatness 1/4 Lambda. Listed for for Watch applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical Glass |
|---|---|
| Substrate | Sapphire |
| Dimension | Customer's Request |
| Wavelength Range | 0.2 – 5.5 Um |
| Transmittance | >95% |
| Coating | HC |
| Surface Quality | 60-40 Scratch and Dig |
| Flatness | 1/4 Lambda |
| Application | for Watch |
| Usage | Medical, Optical |
| Model NO. | yt444 |
| Lenses Color | Clear |
| Parallelism (Arcmin) | ≤3.5 |
| Clear Aperture (%) | ≥95 |
| Coating Requirements | Customer's Request |
| materials comparison | Material |
| Supplier | Changchun Yutai Optics Co., Ltd. |
Technical data
| Material | Sapphire |
|---|---|
| Dimension | Customer's request |
| Parallelism (arcmin) | ≤3.5 |
| Wavelength Range | 0.2 – 5.5um |
| Surface Quality | 60-40 scratch and dig |
| Flatness | 1/4 lambda |
| Clear Aperture | ≥95 |
| Coating | Customer's request |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or quartz grade.
- Outline and thickness — listed as “Customer's Request”; give outline, thickness and tolerances.
- Holes, slots and features — dimension every hole and its position tolerance on the drawing.
- Edges — state edge finish and chamfer.
- Surface — listed as “60-40 Scratch and Dig”; state polish and flatness where they matter.
Engineering guides for this part
For material grades and coating options, see How to Use and Maintain JGS2 Quartz Glass for Optical Windows and Custom Parts. How parts like this are machined and finished is covered in CNC Glass V-Groove Machining for LED and Optical Parts. For an application example, read How to Choose Custom Washing Machine Control Panel Glass: A 2026 Buyer's Guide. Before sending a drawing, check Precision Glass Machining Tolerances & Specifications: A B2B Guide. A related standard product is Custom Special-Shaped Glass Plate.
