Cassegrain telescope: a reflecting telescope composed of two mirrors, which was invented by Cassegrain in 1672. The larger one in the reflector is called the primary mirror, and the smaller one is called the secondary mirror. Usually, a hole is opened in the center of the main mirror to image behind the main mirror. Its focal point is called the Cassegrain focal point. Sometimes, an additional oblique plane mirror is added as shown by the dashed line in the image, forming an image on the side. This Cassegrain telescope, also known as the Nesmus telescope.
Product parameter
| Materials | optical glass, quartz, microcrystal, infrared materials, etc |
| Diameter Range | φ5-350mm |
| Diameter Tolerance | 0/-0.1 |
| Thickness Tolerance | ±0.05 |
| Surface Quality | 20-10 |
| Surface Flatness | PV≤λ/4, rms≤λ/50 |
| Center | 1 ' |
| Chamfer | ≤0.1 |
| Clear Aperture | > 90% |
| Coating | According to customer requirements |
Copyright © Changchun Hongsheng Optoelectronics Co., LTD All Rights Reserved.| Sitemap
Technical Support:
