Product type: Concave Lens. Application: Optical. Model: yt828.
Overview
Optical Glass Bk7/K9, Fused Silica Flat/Concave/Convex Mirror with Dielectric Coating is an optical mirror made from Optical Glass. Listed geometry: diameter 25mm, thickness 3mm, single-lens shape. Optical / electrical data: transmittance 3%. Coating: HC; surface quality 60/40,40/20 or Better. Typical applications: 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 |
| Diameter | 25mm |
| Thickness | 3mm |
| Transmittance | 3% |
| Coating | HC |
| Surface Quality | 60/40,40/20 or Better |
| Usage | Optical |
| Model NO. | yt828 |
| Lenses Color | Clear |
| Polished | Yes |
| Side 1 Radius | Plano |
| Reflectivity | >97% |
| Bevel | 0.25mm×45 ° |
| Centring Erro | <3 Arc Minute |
| Supplier | Changchun Yutai Optics Co., Ltd. |
Technical data
| Material | Optical Glass |
|---|---|
| Diameter | as per your request |
| Diameter Tolerance | +0.1mm |
| Thickness Tolerance | +0.1mm |
| Parallism | 3 arc minutes |
| Edge Thickness | 3mm |
| Flatness | λ/4 |
| Surface Quality | 80/50 60/40 40-20 |
| Bevel | 0.25 mm*45° |
| Coating | dielectric coating |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “25mm”; 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 “0.25mm×45 °”; 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 Fused Silica Windows for UV and Laser Optical Systems. How parts like this are machined and finished is covered in Laser Assisted Glass Cutting for Tight Tolerance Parts. For an application example, read How to Handle and Maintain Precision Glass Components in Laser Systems. Before sending a drawing, check Technical Guide to Glass Thickness and Flatness Requirements. A related standard product is Laser Beam Splitter Glass Sheet.
