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A new achromatic glass for near infrared laser instruments | ||
| Iraqi Journal of Laser | ||
| Article 1, Volume 8, Issue 1, 2009, Pages 7-15 | ||
| Author | ||
| Ali H. Al-Hamdani | ||
| Abstract | ||
| Abstract: This research investigates new glasses which are best suitable for design of optical systems working in the infrared region between 1.01 to 2.3μm. This work is extended to Oliva & Gennari (1995,1998) research in which they found that the best known achromatic pairs are (BAF2-IRG2; SRF2- IRG3; BAF2-IRG7; CAF2-IRGN6; BAF2-SF56A and BAF2-SF6). Schott will most probably stop the production of these very little used and commercially uninteresting IRG glasses. In this work equally good performances can be obtained by coupling BAF2, SRF2&CAF2 with standard glasses from Schott or Ohara Company. The best new achromatic pairs found are (SRF2-S-TIH10; CAF2-S-LAL9; CAF2-SLAL13 and CAF2-S-BAH27). These new achromatic pairs are analyzed by using ZEMAX ray tracing program to design and analyze the same F/2 camera used by Oliva and for the same near infrared region (1.01-2.3μm). The results show that these pairs of glass have good performance in infrared design applications. | ||
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