Product type: Flat Lens. Application: Optical. Model: yt449.
Overview
Diameter 50mm 2 Inches Thick 420-450um Ssp 60/40 Stock Sapphire Glass Wafer/Sheet: a sapphire / specialty wafer made from Glass. Listed geometry: diameter 25.4mm.12.7mm or Else, thickness < 6 mm, single-lens shape. Optical / electrical data: bandwidth as Request, transmittance 90%-95%. Coating: HC; surface quality 60/40 or Better; flatness L/4. 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 | Glass |
|---|---|
| Type | Flat Lens |
| Shape | Single-lens |
| Diameter | 25.4mm.12.7mm or Else |
| Thickness | < 6 mm |
| Fwhm | as Request |
| Transmittance | 90%-95% |
| Coating | HC |
| Surface Quality | 60/40 or Better |
| Flatness | L/4 |
| Parallelism | <3 Arc Minute |
| Usage | Optical |
| Model NO. | yt449 |
| Diameter Tolerance | +/-0.01 mm |
| Thickness Tolerance | +/-0.01mm |
| Chamfer | Standard Protective Chamfers |
| Supplier | Changchun Yutai Optics Co., Ltd. |
Technical data
| Product Name | Diameter 50mm 2 inches Thick 420-450um SSP 60/40 Stock Sapphire Glass Wafer/Sheet |
|---|---|
| Material | Sapphire |
| Diameter | 2 inches |
| Diameter Tolerance | +-0.01mm |
| Thickness | 420-450um |
| Shape | Round |
| Surface | SSP |
| Surface Quality | 60/40 |
| Bevel | NONE |
| Coating | uncoated |
What to specify when you request a quote
- Diameter and flat / notch — listed as “25.4mm.12.7mm or Else”; state diameter, flat or notch and their tolerances.
- Thickness and TTV — listed as “< 6 mm”; give thickness, its tolerance and total thickness variation.
- Polish and roughness — listed as “60/40 or Better”; specify single- or double-side polish and roughness.
- Flatness, bow and warp — listed as “L/4”; quote flatness, bow and warp limits.
- Material grade — listed as “Glass”; name the grade (JGS1/JGS2, Borofloat 33, alkali-free, sapphire orientation).
Engineering guides for this part
For material grades and coating options, see Fused Quartz Wafer Substrate Selection: Materials & Coatings for Semiconductor and Optical Systems. How parts like this are machined and finished is covered in Glass Wafer Bonding for Microfluidic and MEMS Applications: Process Overview. For an application example, read Custom LED Cover Glass for Home Appliance Indicator Panels. A related standard product is CCD Optical Screening Glass Plate.
