Theoretical principles and design practices for edge filters and coatings

Yongli Xu; Robert G. Benson; Jue Wang; Jingyu Lao; Rekha Doshi; Shane M. Stephens; Joseph M. Kunick

doi:10.1117/12.3013710

7 June 2024 Theoretical principles and design practices for edge filters and coatings

Yongli Xu, Robert G. Benson, Jue Wang, Jingyu Lao, Rekha Doshi, Shane M. Stephens, Joseph M. Kunick

Proceedings Volume 13042, Advanced Optics for Imaging Applications: UV through LWIR IX; 130420B (2024) https://doi.org/10.1117/12.3013710
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

In this paper, edge filters including short pass (SP) filters and long pass (LP) filters are reviewed in terms of definition and features. The necessity of SP and particularly LP filters and their functions in an optical system are addressed in depth. Principles of defining the OD level in the blocking band are elaborated for different spectra ranges, particularly for long wavelength LP filters. For SP filters, the filter design, performance, and potential applications are discussed. An example is given on a DUV filter via reactive plasma ion assisted deposition of HfO2/SiO2 that suppresses solar background at wavelengths above 300 nm and transmits 260-290 nm radiation. For LP filters, the design principles of the blocking band for the LP filter using the substrate, absorption material in coating, and interference type reflective coating are discussed. Semiconductor materials and doping levels for different bandgap energies and cut-on wavelengths are proposed for blocking band solutions. Examples of design practices cover a broad spectra range including short wavelength infrared (SWIR), mid-wavelength infrared (MWIR), and long wavelength infrared (LWIR). Coating challenges, for example element segregations in the deposition of a compound semiconductor, are discussed. Finally, quality control and related issues are also addressed.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yongli Xu, Robert G. Benson, Jue Wang, Jingyu Lao, Rekha Doshi, Shane M. Stephens, and Joseph M. Kunick "Theoretical principles and design practices for edge filters and coatings", Proc. SPIE 13042, Advanced Optics for Imaging Applications: UV through LWIR IX, 130420B (7 June 2024); https://doi.org/10.1117/12.3013710

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available