Translator Disclaimer
22 June 2013 A filter lens for optical compensation in transmission spectrum
Author Affiliations +
Proceedings Volume 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 87692U (2013) https://doi.org/10.1117/12.2019725
Event: International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 2013, Singapore, Singapore
Abstract
The absorbing filter [1] is an optical element employed for isolating regions of a spectrum. In general, the thicker the absorbing filter material, the more wavelengths it will absorb. However, most optical filter products ignore light diffusion and are made with a constant thickness. While the non-collimated beams pass through the filter, the optical paths vary with incident angles. Thus, the absorption difference happens and leads to the poor uniformity of transmission spectrum. In our work, a filter lens was developed to achieve the similar function of interference filter and ND filter with better spectrum uniformity. It is mounted onto a designed macro lens and supplies it with a good spectrum aberration correction. The shape of the filter lens is designed to eliminate the optical path differences between the light beams in the medium. The macro lens is made of neutral glass and shaped into symmetrical biconvex for achieving macro imaging. The spectrum characteristic of the filter lens depends on the material of the absorbing filter. In the experiment, the filter lens was prepared. The experimental results show that the spectrum uniformity of the filter lens is better than that of the normal filter.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yu-Hsuan Lin, Hsin-Yi Tsai, Han-Chao Chang, Chun-Jen Weng, and Kuo-Cheng Huang "A filter lens for optical compensation in transmission spectrum", Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87692U (22 June 2013); https://doi.org/10.1117/12.2019725
PROCEEDINGS
4 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Exact caustic produced through separated doublets
Proceedings of SPIE (January 01 1900)
Hybrid achromatic spectacle lens
Proceedings of SPIE (November 21 2003)
Visible And Ultraviolet Bandpass Filters
Proceedings of SPIE (March 01 1974)
A review of metal mesh filters
Proceedings of SPIE (June 16 2006)

Back to Top