Image-forming optical system, illumination apparatus, and observation apparatus

Patent metadata

Field	Value
Publication number	US-10108008-B2
Application number	US-201514873592-A
Country	US
Kind code	B2
Filing date	Oct 2, 2015
Priority date	Apr 3, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An image-forming optical system includes a plurality of image-forming lenses that form a final image and at least one intermediate image; a first phase modulator that is disposed closer to an object side than any one of the intermediate images formed by the image-forming lenses and that applies a spatial disturbance to a wavefront of light coming from the object; and a second phase modulator that is disposed at a position that sandwiches at least one of the intermediate images with the first phase modulator and that cancels out the spatial disturbance applied to the wavefront of the light coming from the object by the first phase modulator.

First claim

The invention claimed is:

1. An image-forming optical system comprising:
a plurality of image-forming lenses that form a final image and at least one intermediate image;
a first phase modulator that is disposed closer to an object than any one of the intermediate images formed by the image-forming lenses and that applies a spatial disturbance to a wavefront of light coming from the object; and
a second phase modulator that is disposed at a position that sandwiches at least one of the intermediate images with the first phase modulator and that cancels out the spatial disturbance applied to the wavefront of the light coming from the object by the first phase modulator, wherein the first phase modulator and the second phase modulator are disposed in a vicinity of pupil positions of the image-forming lenses.

2. The image-forming optical system according to claim 1 , wherein the first phase modulator and the second phase modulator are disposed at optically conjugate positions.

Assignees

• Olympus Corp

Inventors

• Fukuyama Hiroya

Classifications

• G02B5/1861

  Reflection gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials (G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence) · CPC title

• G02B5/18

  Diffraction gratings {(holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44)} · CPC title

• G02B3/08

  with discontinuous faces, e.g. Fresnel lens {(diffractive Fresnel lenses G02B5/1876)} · CPC title

• G02B21/04

  involving mirrors · CPC title

• G02B5/1876

  Diffractive Fresnel lenses; Zone plates; Kinoforms (G02B5/1842, G02B5/1847 take precedence; optical systems having diffractive correction means G02B27/0037; Fresnel lenses operating by refraction G02B3/08) · CPC title