Product type: Fresnel Lenses. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The 25.4mm Photo-Etching Optical Glass Positive/Negative Fresnel Lens is supplied as an optical lens made from Optical Glass. Listed geometry: diameter 25.4mm, single-lens shape. Optical / electrical data: transmittance 90%-95%. Coating: HMC; surface quality 10/5(can change for different types and as required). Typical applications: Lighting, Medical, Optical, Photography and Astronomy. 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 | Fresnel Lenses |
| Shape | Single-lens |
| Transmittance | 90%-95% |
| Coating | HMC |
| Surface quality | 10/5(can change for different types and as required) |
| Parallelism | < 1arcsec(can change for different types and as rquired) |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Lenses Color | Clear |
| Materials | Optical Glass or Plastic. |
| Diameter range | 25.4mm |
| Dimension tolerance | +/0.005mm,+/-0.1mm |
| Thickness tolerance | +/-0.005mm,+/-0.1mm |
| Package detail | Optics are packed with Capacitor paper, white paper, custom-made plastic containers etc |
| Supplier | CPG OPTICS LIMITED |
What to specify when you request a quote
- Material — listed as “Optical Glass”; name the glass or crystal.
- Geometry — listed as “25.4mm”; give diameter, focal length or radii, angles and tolerances.
- Surface figure — listed as “10/5(can change for different types and as required)”; quote surface figure (λ) and scratch-dig.
- Centring and edges — state centration and edge chamfer.
- Coating — listed as “HMC”; list the band and reflectance or transmission target.
Engineering guides for this part
For material grades and coating options, see Fused Silica and Other Glass Materials for Machined Components. How parts like this are machined and finished is covered in Flat Glass Polishing Process for Precision Substrates. For an application example, read Fused Silica Glass Wafers for Precision Appliance Electronics. Before sending a drawing, check Fused Silica Refractive Index: Key to Optical Design Improvement. A related standard product is Etched Glass Cover for LED/OLED Packaging.
