US 2003/0142308 A1 · Multi-path monochromator

Abstract

In order to provide a multi-path monochromator capable of reducing the size of optical parts with a high resolution and a wide dynamic range, the multi-path monochromator has a lens 2 used as a first collimator for converting an incident light into a parallel light, a diffraction grating 4 for diffracting an output light outputted from the lens 2, plane mirrors 3 and 5 for reflecting a diffraction light diffracted by the diffraction grating 4 to return the diffraction light back to a same path, a parabolic mirror 7 used as a second collimator for collecting a diffraction light which is again diffracted by the diffraction grating into which a reflected light is again outputted from the plane mirror, and an output slit positioned at a focal position of the parabolic mirror 7. The parabolic mirror 7 used as the second collimator has a focal length which is longer than a focal length of the lens used as the first collimator.

Claims7

Dependent claims

A multi-path monochromator comprising:

a first collimator for converting an incident light into a parallel light;
a diffraction grating for diffracting an output light supplied from the first collimator;
a plane mirror for reflecting a diffraction light diffracted by the diffraction grating to return the diffraction light back to a same path;
a second collimator for collecting a diffraction light which is again diffracted by the diffraction grating into which a reflected light is again supplied from the plane mirror;
and
an output slit positioned at a focal position of the second collimator;
the second collimator having a focal length which is longer than a focal length of the first collimator.

4 more elements

A multi-path monochromator comprising:

a first collimator for converting an incident light into a parallel light;
a diffraction grating for diffracting an output light supplied from the first collimator;
a plane mirror for reflecting a diffraction light diffracted by the diffraction grating to return the diffraction light back to a same path;
a second collimator for collecting a diffraction light which is again diffracted by the diffraction grating into which a reflected light is again supplied from the plane mirror;
a first output slit positioned at a focal position of the second collimator;
a second output slit positioned at a focal position of the second collimator;
and
a differential dispersive type returning reflection section for returning the output light of the second collimator that passes through the first output slit, back to the direction of the second collimator, the differential dispersive type returning reflection section focusing a diffraction light which is diffracted at four times via the same path, on the second output slit by using the second collimator;
the second collimator having a focal length which is longer than a focal length of the first collimator.

6 more elements

A multi-path monochromator comprising:

a first collimator for converting an incident light into a parallel light;
a diffraction grating for diffracting an output light supplied from the first collimator;
a plane mirror for reflecting a diffraction light diffracted by the diffraction grating to return the diffraction light back to a same path;
a second collimator for collecting a diffraction light which is again diffracted by the diffraction grating into which a reflected light is again supplied from the plane mirror;
a first output slit positioned at a focal position of the second collimator;
a second output slit positioned at a focal position of the second collimator;
and
an addition dispersive type returning reflection section for returning the output light of the second collimator that passes through the first output slit, back to the direction of the second collimator, the additional dispersive type returning reflection section focusing a diffraction light which is diffracted at four times via the same path, on the second output slit by using the second collimator;
the second collimator having a focal length which is longer than a focal length of the first collimator.

6 more elements

Dependencies are inferred from the claim text.

Multi-path monochromator

Life of this patent

Multi-path monochromator

Life of this patent

Abstract

Claims7