Product type: Flat Lens. Application: Medical, Optical, Photography. Model: yt442.
Overview
Hardness Random Orientation Sapphire Windows Thin Sapphire Wafers: a sapphire / specialty wafer made from Optical Glass. Listed geometry: single-lens shape. Optical / electrical data: transmittance >95%. Coating: HMC. Typical applications: Medical, Optical and Photography. 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 | Flat Lens |
| Shape | Single-lens |
| Transmittance | >95% |
| Coating | HMC |
| Usage | Medical, Optical, Photography |
| Model NO. | yt442 |
| Lenses Color | Clear |
| Color | Siliver |
| Polished | Yes |
| Supplier | Changchun Yutai Optics Co., Ltd. |
Technical data
| Orientation | R-plane, C-plane, A-plane, M-plane ,random orientation/ a specified orientation |
|---|---|
| Orientation Tolerance | ± 0.3° |
| Diameter | 2 inches, 3 inches, 4 inches, 6 inches, 8 inches or others |
| Diameter Tolerance | 0.1mm for 2 inches, 0.2mm for 3 inches, 0.3mm for 4 inches, 0.5mm for 6 inches |
| Thickness | 0.25mm, 0.33mm, 0.43mm, 0.65mm, 1mm or others; |
| Thickness Tolerance | 25μm |
| Primary Flat Length | 16.0±1.0mm for 2 inches, 22.0±1.0mm for 3 inches, 30.0±1.5mm for 4 inches, 50.0±2.0mm for 6 inches |
| Primary Flat Orientation | A-plane (1 1-2 0 ) ± 0.2°; C-plane (0 0-0 1 ) ± 0.2°, Projected C-Axis 45 +/- 2° |
| TTV | ≤10µm for 2 inches, ≤15µm for 3 inches, ≤20µm for 4 inches, ≤25µm for 6 inches |
| BOW | ≤10µm for 2 inches, ≤15µm for 3 inches, ≤20µm for 4 inches, ≤25µm for 6 inches |
| Front Surface | Epi-Polished (Ra< 0.3nm for C-plane, 0.5nm for other orientations) |
| Back Surface | Fine ground (Ra=0.6μm~1.4μm) or Epi-polished |
What to specify when you request a quote
- Diameter and flat / notch — state diameter, flat or notch and their tolerances.
- Thickness and TTV — give thickness, its tolerance and total thickness variation.
- Polish and roughness — listed as “Yes”; specify single- or double-side polish and roughness.
- Flatness, bow and warp — quote flatness, bow and warp limits.
- Material grade — listed as “Optical 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 Precision Glass Hole Machining for MEMS and Wafer Parts. For an application example, read Boost Yield with Fused Silica Viewports for Vacuum and Optical Systems. Before sending a drawing, check Specifying Coatings for Custom Glass Windows and Substrates. A related standard product is Infrared Windows.
