UPT can offer Fresnel Rhomb Retarder as requirements, can use design as L/4 retardation or L/2 retardation, wavelength 400-2000nm or 200-2000nm . our company name is -United photonics technology ,
Specification:
| GENERAL | HIGH PRECISION | |
| Material | N-BK7, CDGM H-K9L, Fused silica, Corning 7980 | |
| Design wavelength | 546.07nm | |
| Design index (bk7) | 1.51680 for BK7, 1.45846 for Fused Silica | |
| Diameter tolerance | +0.0, -0.2mm | +0.0, 0.05mm |
| Aperture | 10x10 | 10x10 |
| retardation | L/4 Or L/2 | L/4 Or L/2 |
| Clear aperture | 80% | 90% |
| Surface quality | 60-40 scratch and dig | 20-10 scratch and dig |
| Surface irregularity | < λ/10 | < λ/10 |
| Protective bevel | 0.25 + 0.25, -0.0mm | 0.2 ± 0.1mm |
Note for Lens:
(1). made from materials such as N-BK7, Fused Silica, are available upon request.
(2). Custom-made at any size from Φ3.0mm to Φ25mm clear aperture are available.
(3). 90% clear aperture is available upon request.
(4). Better bevel is available upon request.
