QC 351 A7 no. 40 / The aim of this study was to determine to what extent a constant spectral response can be obtained for wide-passband interference filters used
with wide -angle lenses. We investigated the possibility of using the curvature of the lens surfaces to reduce the shift in the filter passband for
large field angles and found that locating the filter on the proper surface
will considerably reduce the shift of the passband.
Specifically, we determined the distribution of angles of incidence
for full aperture pencils incident at several field angles on the second and
fourth surfaces of the 90° Geocon IV, the 90° Paxar, and the 125° Pleogon.
We then calculated the spectral transmittance of each lens when a wide passband interference filter was located on its second or fourth surface. We
also calculated the degree of polarization introduced.
From the cases considered, we found that the tracing of an upper and
lower marginal (rim) ray at maximum field angle is sufficient to determine
the suitability of a surface, the criterion being that, the smaller the angle of incidence at the surface, the better. In addition, we found that,
with the filter on the second surface of the Paxar, spectral transmittance
changes with field angle were negligible and the modulation due to polarization was about 1 %.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/621634 |
| Date | 10 June 1969 |
| Creators | McKenney, D. B., Slater, P. N. |
| Publisher | Optical Sciences Center, University of Arizona (Tucson, Arizona) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | Technical Report |
| Rights | Copyright © Arizona Board of Regents |
| Relation | Optical Sciences Technical Report 40 |
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