The University of Tokyo

Canon Kabushiki Kaisha

Japan Science and Technology Corporation

Makoto Gonokami

Kenji Takeda

Takashi Sukegawa

Yohei Kobayashi

Mamoru Endo

Akira Ozawa

Daisuke Hirano

Kosuke Yoshioka

A coherent light source outputs coherent light including high-order harmonics obtained by irradiating short-pulse laser light to a nonlinear medium. A spectrometer includes a grating that diffracts the coherent light and an image sensor that measures an image of the diffracted light. In a first state, a first double slit having a pair of apertures spaced apart in a first direction is arranged at a predetermined position between coherent light source and an incident slit of spectrometer. In a second state, a second double slit that is a replica of first double slit is arranged at the predetermined position as a replacement of first double slit with a sample held in one aperture. A calculation processing device calculates optical constants of the sample based on interference images measured in the first and second states.

Device and method for measuring optical constant

The present invention provides a spectral apparatus for spectrally separating light including a predetermined wavelength, including a slit that the light enters, a first optical system configured to collimate the light from the slit, a transmissive type diffraction element configured to diffract the light from the first optical system, and a second optical system including a first mirror configured to reflect the light diffracted by the transmissive type diffraction element, and a second mirror configured to reflect the light reflected by the first mirror and diffracted by the transmissive type diffraction element, and configured to make the light reciprocally travel between the first mirror and the second mirror via the transmissive type diffraction element.

Spectral apparatus, detection apparatus, light source apparatus, reaction apparatus, and measurement apparatus

A 1,4-di-substituted diacetylene polymer that is soluble in organic solvent, is composed of a repeating unit represented by the general formula &#x2550;CR&#x2014;C&#x2261;C&#x2014;CR'&#x2550; (wherein, R and R&#x2032; represent identical or different monovalent organic substituents), and has an average degree of polymerization of 4 to 200 and a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight corresponding to said average degree of polymerization (Mn) of 1.1 to 5.0, and

1,4-disubstituted diacetyline polymer and process for producing the same

Growing community of inventors

Tokyo, Japan

Makoto Gonokami