Concatenated silicon etalon tunable filter for hyperspectral imaging in the near infrared

Hadar Pinhas; Amir Shemer; Omer Wagner; Yossef Danan; Yafit Fleger; Yonathan Ramon; Meir Danino; Moshe Sinvani; Zeev Zalevsky

doi:10.1117/1.OE.57.11.115101

8 November 2018 Concatenated silicon etalon tunable filter for hyperspectral imaging in the near infrared

Hadar Pinhas, Amir Shemer, Omer Wagner, Yossef Danan, Yafit Fleger, Yonathan Ramon, Meir Danino, Moshe Sinvani, Zeev Zalevsky

Author Affiliations +

Optical Engineering, Vol. 57, Issue 11, 115101 (November 2018). https://doi.org/10.1117/1.OE.57.11.115101

Abstract

A critical limitation imposed on all imaging systems is to achieve an optimal balance between optical resolution and bandwidth. The optical system determines and affects the relations between temporal information, spatial bandwidth, and resolution, so the resulting signal may differ for each wavelength. This is of significant importance for hyperspectral imaging in particular, because it extracts both spatial and temporal wavelength information. We present a dispersive device that can be used for hyperspectral imaging hypercube image measurements. We utilize the Vernier effect by integrating two silicon slabs that act together as a modified Fabry–Perot filter. The transition between wavelength bands is achieved by heating, utilizing the thermo-optic effect. Importantly, we show that red-shifting with concatenated slabs requires less heating than with a single slab. With the presented technique, a wide effective free spectral range of up to 90 nm around a central wavelength of 1550 nm was achieved along with 20-nm full-width-at-half-maximum resolution. With the same configuration, observing a narrower 0.7-nm free spectral range bandwidth, a fine spectrum resolution of 0.07 nm was obtained. Such variety covers most of the spatial and temporal standard limitations of current hyperspectral imaging requirements.

Citation Download Citation

Hadar Pinhas, Amir Shemer, Omer Wagner, Yossef Danan, Yafit Fleger, Yonathan Ramon, Meir Danino, Moshe Sinvani, and Zeev Zalevsky "Concatenated silicon etalon tunable filter for hyperspectral imaging in the near infrared," Optical Engineering 57(11), 115101 (8 November 2018). https://doi.org/10.1117/1.OE.57.11.115101

Received: 9 August 2018; Accepted: 15 October 2018; Published: 8 November 2018

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

Members: $24.00

Non-members: $28.00 ADD TO CART

JOURNAL ARTICLE
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Silicon

Nanoparticles

Tunable filters

Fabry–Perot interferometers

Hyperspectral imaging

Optical filters

Refractive index

Show All Keywords

Keywords/Phrases

Search In:

Publication Years