title: Planar reflection grating lens for compact spectroscopic imaging system.
abstract: A compact spectroscopic imaging device consisting of a planar reflection grating lens, a probe fiber array, and a two-dimensional image sensor was proposed and discussed. Reflected or luminescent lights from a subject are coupled to the probe fibers, guided to fiber output ends, radiated into the air, diffracted by the grating lens with wavelength-dependent angle, and focused onto lines on the image sensor. Two-dimensional intensity distribution on the image sensor can give one-dimensional spectrum distribution along a specified direction. A grating lens was designed with a fiber array and a CCD image sensor for 100-nm wavelength range and 10-mm fiber array width. A spectral resolution of 5 nm and a spatial resolution of 0.25 mm were experimentally confirmed.
authors.affiliation: Department of Electronics and Information Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Ura
authors.forename: Fumikazu
authors.initials: F
authors.lastname: Okayama
authors.forename: Koichi
authors.initials: K
authors.lastname: Shiroshita
authors.forename: Kenzo
authors.initials: K
authors.lastname: Nishio
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sasaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nishihara
authors.forename: Tsutom
authors.initials: T
authors.lastname: Yotsuya
authors.forename: Masato
authors.initials: M
authors.lastname: Okano
authors.forename: Kazuo
authors.initials: K
authors.lastname: Satoh