Abstract
A hybrid diffractive-refractive infrared lens of germanium was fabricated by means of diamond turning, in which the diffractive surface was produced on an aspheric substrate. The test results for the hybrid lens and a comparative lens without the diffractive structure show that the diffractive surface is fabricated with good accuracy. It reduces the chromatic aberration of the single lens system, and significantly improves the image quality of the system, which corresponds well to the design result.
| Original language | English |
|---|---|
| Pages (from-to) | 308-312 |
| Number of pages | 5 |
| Journal | Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves |
| Volume | 23 |
| Issue number | 4 |
| Publication status | Published - Aug 2004 |
Keywords
- Aspheric substrate
- Diamond turning
- Diffractive optical element
- Infrared imaging system