Compact multispectral fluorescence imaging system with spectral multiplexed volume holographic grating

Yanlu Lv; Chuangjian Cai; Jing Bai; Jianwen Luo

doi:10.1117/12.2239925

9 December 2016 Compact multispectral fluorescence imaging system with spectral multiplexed volume holographic grating

Yanlu Lv, Chuangjian Cai, Jing Bai, Jianwen Luo

Proceedings Volume 10013, SPIE BioPhotonics Australasia; 100132V (2016) https://doi.org/10.1117/12.2239925
Event: SPIE BioPhotonics Australasia, 2016, Adelaide, Australia

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.

Citation Download Citation

Yanlu Lv, Chuangjian Cai, Jing Bai, and Jianwen Luo "Compact multispectral fluorescence imaging system with spectral multiplexed volume holographic grating", Proc. SPIE 10013, SPIE BioPhotonics Australasia, 100132V (9 December 2016); https://doi.org/10.1117/12.2239925

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KEYWORDS

Imaging systems

Luminescence

Multiplexing

Multispectral imaging

Holograms

Volume holography

Diffraction

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