Patent ID: 8891089
Filing Date: 2014-11-18
Classification: G01J,G01N,G03H

Abstract:
1. A phase object identification device for detecting a correlation between a phase object to be identified and a known phase object, the device comprising: a light source; sample holding means for holding a phase object to be identified comprising sample positioning means for shifting the phase object to be identified in a planar direction orthogonal to an optical axis; an observation optical system comprising a sample-side objective lens and an imaging lens or an eyepiece for observing an image of the phase object to be identified, the phase object held by the sample holding means, the observation optical system configured to form the image of the phase object to be identified; focusing means for changing the distance between the phase object to be identified and the sample-side objective lens; a holographic recording medium on which a hologram formed by interference between reference light and object light that is phase-modulated by a phase pattern of a known phase object is recorded; a light detector; and an identification optical system in which a phase of light emitted from the light source is modulated by a phase pattern of the phase object to be identified to generate sample light, the hologram of the holographic recording medium is irradiated with the sample light, and reproduced light reproduced from the hologram of the holographic recording medium is detected by the light detector, and the sample-side objective lens of the observation optical system is also used as an optical component of the identification optical system, wherein the observation optical system comprises a beam splitter configured to direct a portion of the generated sample light to an image sensor, and wherein the image of the phase object to be identified is formed by the image sensor utilizing said portion of the generated sample light that is excluded from passing through the hologram of the holographic recording medium.