Product type: Concave Lens. Application: Medical, Optical. Model: yt921.
Overview
The Protective Optical Infrared Germanium Lens Windows for Thermal Imaging is supplied as an optical lens made from Optical Glass. Listed geometry: diameter +/-0.15 mm, single-lens shape. Optical / electrical data: transmittance 90%-95%. Coating: HC; surface quality 60/40,40/20 or Better. It is used in Medical and 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 | Single-lens |
| Transmittance | 90%-95% |
| Coating | HC |
| Surface Quality | 60/40,40/20 or Better |
| Clear Aperture | 90% |
| Usage | Medical, Optical |
| Model NO. | yt921 |
| Lenses Color | Clear |
| Color | Transparent |
| Polished | Yes |
| Diameter Tolerance | +/-0.15 mm |
| Thickness Tolerance | +/-0.1mm |
| Centring Error | <3 Arc Minute |
| Bevel | 0.25mm×45 ° |
| Supplier | Changchun Yutai Optics Co., Ltd. |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “+/-0.15 mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “60/40,40/20 or Better”; quote surface figure (λ) and scratch-dig.
- Centring and edges — listed as “<3 Arc Minute”; state centration and edge chamfer.
- Coating — listed as “HC”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Infrared Window Glass: Material Options for Optical Sensors & Parts. How parts like this are machined and finished is covered in Optical Glass Polishing for High Clarity Surfaces. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is Infrared Windows.
