title: Simple two-dimensional-imaging spectrograph with wedged narrow band filters.
abstract: A minute, yet practical, modification of a well-known spectrograph based on a set of wedged narrow band filters is presented. It makes possible two-dimensional-imaging spectral measurements with a potential subpixel precision of a few micrometers. The simple spectroscopic device can evaluate dispersion of quantities which can be transformed into an image, e.g., into a spatial beam distribution. The spectrograph was used to measure angular dispersion of both a laser oscillator producing femtosecond pulses and a simple dispersive optical system, an optical wedge.
authors.affiliation: Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Brehova 7, 115 19 Prague 1, Czech Republic. divoky@fzu.cz
authors.forename: Martin
authors.initials: M
authors.lastname: Divoký
authors.forename: Petr
authors.initials: P
authors.lastname: Straka
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D007368:Interferometry / Q000379:methods; D007834:Lasers; D008856:Microscopy, Fluorescence / Q000295:instrumentation / Q000379:methods; D055095:Optics and Photonics; D009991:Oscillometry; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013053:Spectrophotometry / Q000379:methods*; D013997:Time Factors