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Proceedings Paper

Compact multispectral fluorescence imaging system with spectral multiplexed volume holographic grating
Author(s): Yanlu Lv; Chuangjian Cai; Jing Bai; Jianwen Luo
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Paper Abstract

Traditional spectral imaging systems mainly rely on spatial scanning or spectral scanning methods to acquire spatial and spectral features. The acquisition is time-consuming and cannot fully satisfy the need of monitoring dynamic phenomenon and observing different structures of the specimen simultaneously. To overcome these barriers, we develop a video-rate simultaneous multispectral imaging system built with a spectral multiplexed volume holographic grating (VHG) and few optical components. Four spectral multiplexed volume holograms optimized for four discrete spectral bands (centered at 488 nm, 530 nm, 590 nm and 620 nm) are recorded into an 8×12 mm photo-thermal refractive glass. The diffraction efficiencies of all the holograms within the multiplexed VHG are greater than 80%. With the high throughout multiplexed VHG, the system can work with both reflection and fluorescence modes and allow simultaneous acquisition of spectral and spatial information with a single exposure. Imaging experiments demonstrate that the multispectral images of the target illuminated with white light source can be obtained. Fluorescence images of multiple fluorescence objects (two glass beads filled with 20 uL 1.0 mg/mL quantum dots solutions that emit 530 ± 15 nm and 620 ± 15 nm fluorescence, respectively) buried 3 mm below the surface of a tissue mimicking phantom are acquired. The results demonstrate that the system can provide complementary information in fluorescence imaging. The design diagram of the proposed system is given to explain the advantage of compactness and flexibility in integrating with other imaging platforms.

Paper Details

Date Published: 9 December 2016
PDF: 5 pages
Proc. SPIE 10013, SPIE BioPhotonics Australasia, 100132V (9 December 2016); doi: 10.1117/12.2239925
Show Author Affiliations
Yanlu Lv, Tsinghua Univ. (China)
Chuangjian Cai, Tsinghua Univ. (China)
Jing Bai, Tsinghua Univ. (China)
Jianwen Luo, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 10013:
SPIE BioPhotonics Australasia
Mark R. Hutchinson; Ewa M. Goldys, Editor(s)

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