Calcium fluoride (Caf2) Plano convex lens
- The calcium fluoride plano convex lens has high transmittance within the wavelength range of 180nm-8μm (especially in the wavelength range of 350nm-7μm, the transmittance exceeds 90%) and low refractive index (for the working wavelength range of 180nm to 8.0μm, the refractive index variation range is 1.35 to 1.51). Therefore, it has high transmission even without coating.
- It is often used as a window and lens of spectrometer, and also in thermal imaging system. In addition, because of its high laser damage threshold, it has a good application in excimer lasers. Calcium fluoride has higher hardness than barium fluoride, magnesium fluoride and other similar substances.
A plano convex lens is usually used to focus parallel light. The front and rear surfaces of the plano convex lens are asymmetric, so the spherical difference can be effectively reduced, especially in the application of unequal object-image distance. The best application is to place the object at infinity (i.e. regarded as parallel light incidence) and image it in the focal plane. At this time, the object image conjugate ratio (i.e. object distance / image distance) is infinite. The convex surface of the lens should be placed in the direction of the object.
| Items | Parameters |
|---|---|
| Material | CaF2 (single crystal calcium fluoride) |
| Radius of curvature | ± 1mm - ± 50000mm ± 1% |
| Diameter | 3mm-300mm ± 0.1mm |
| Center thickness tolerance | ± 0.05mm (we can process to ± 0.01mm with high precision) |
| Center deviation | 3′(we can process to 30 ″with high precision) |
| Surface accuracy | λ/ 8 (high precision, we can process to 1 / 10λ) |
| Surface quality | 40/20 (we can process to 10-5 with high precision) |
| Effective caliber | ≥90% |
| Coating | IR AR Coating 3-5μm or Customized according to customer requirements |
In addition, we have thousands of stock of K9 plano convex lens, biconvex lens, plano concave lens, biconvex lens, meniscus lens and so on. The price is preferential and the quality is excellent, which can meet your demand for a small order. For details, please consult:
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