Abstract

A new concept for the design of broadband (2–25 μm and beyond) neutral-density filters in the infrared region without étaloning effects is proposed and demonstrated. One important aspect of the technique is to use metallic-thin-film (10–200-nm-thick) multilayer combinations deposited onto different substrates (ZnSe, CdTe, Lexan). Neutral-density filters with optical densities as high as 4 are designed and built in the broadband region (2–25 μm). Another key innovation is the use of ultrathin substrates (∼100 nm thick) for elimination of étaloning effects normally present in thick (>0.5-mm) substrates. Neutral-density filters with such ultrathin substrates are also designed and investigated.

© 1994 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Multilayer dichroic mirrors for the 16-μm spectral region: their design and fabrication

Philip Baumeister, James Pritts, David Lees, and David F. Edwards
Appl. Opt. 18(18) 3127-3132 (1979)

Antireflection coatings for both visible and far-infrared spectral regions

Li Li, J. A. Dobrowolski, J. D. Sankey, and J. R. Wimperis
Appl. Opt. 31(28) 6150-6156 (1992)

Infrared characterization of surfaces and coatings by internal-reflection spectroscopy

E. D. Palik, J. W. Gibson, R. T. Holm, M. Hass, M. Braunstein, and B. Garcia
Appl. Opt. 17(11) 1776-1785 (1978)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription