Spectrally encoded forward view and spectrally encoded multi-view endoscope using back-reflected light between reflective surfaces

• US 10,682,044 B2
• Filed: 01/10/2018
• Issued: 06/16/2020
• Est. Priority Date: 01/12/2017
• Status: Active Grant

• Current Assignee: Canon USA, Inc. (Canon Inc.)
• Original Assignee: Canon USA, Inc. (Canon Inc.)
• Inventors: Wu, Tzu-Yu, Ikuta, Mitsuhiro, Takeuchi, Seiji, Kohara, Naoki, Koyama, Osamu
• Primary Examiner(s): Jordan, Andrew
• Application Number:
  US16/476,826
• Publication Number:
  US 20190374092A1
• Time in Patent Office: 888 Days
• CPC Class Codes: A61B 1/00096 Optical elements
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00181 for multiple fixed viewing angles A61B1/00193 takes precedence
• CPC Class Codes: A61B 1/0623 for off-axis illumination
• CPC Class Codes: A61B 1/0638 providing two or more wavelengths
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: G01J 3/0205 Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
• CPC Class Codes: G01J 3/0208 using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0224 using polarising or depolarising elements
• CPC Class Codes: G01J 3/0256 Compact construction
• CPC Class Codes: G01J 3/0289 Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
• CPC Class Codes: G01J 3/18 using diffraction elements, e.g. grating gratings per se G02B
• CPC Class Codes: G02B 23/2469 using optical fibres
• CPC Class Codes: G02B 23/26 using light guides for illumination G02B23/2469
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 27/4244 in wavelength selecting devices spectrometry G01J
• CPC Class Codes: G02B 3/0087 with index gradient
• CPC Class Codes: G02B 5/1814 structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings G02B5/189 takes precedence

Claims