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US 7,705,311 B2Granted
Optical-path-difference compensation mechanism for acquiring wave from signal of time-domain pulsed spectroscopy apparatus
AssigneesJapan Science and Technology Agency, Seizi Nishizawa
InventorsSeizi Nishizawa, Toshiyuki Iwamoto
Life of this patent
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Abstract
A time-domain pulsed spectroscopy apparatus which has a pulsed laser light source; a splitting unit to split pulsed laser light; a pulsed-light emitting unit; a detector; a sample holder; and a sample-unit entrance and exit optical systems; wherein the time-domain pulsed spectroscopy apparatus further comprises: at least one optical-path-length varying unit for setting a photometric range; at least one optical delay unit for the wave form signal measurement; and, at least one gate member to pass or block the pulsed light to a reflector.
Claims18
A time-domain pulsed spectroscopy apparatus comprising:
- a pulsed laser light source;
- a splitting unit configured to split pulsed laser light from the pulsed laser light source into excitation pulsed laser light and detection pulsed laser light;
- a pulsed-light emitting unit configured to emit pulsed light including wavelengths in the far-infrared wavelength region due to irradiation of the excitation pulsed laser;
- a detector configured to detect a time-serial signal of the electric field intensity of reflected or transmitted pulsed light from the sample onto which the pulsed light from the pulsed-light emitting unit is radiated;
- a sample holder configured to hold the sample;
- and
- sample-unit entrance and exit optical systems configured to guide the pulsed light from the pulsed-light emitting unit to the sample and to guide to the detector pulsed light reflected from or transmitted through the sample due to the irradiation,
- wherein, from the pulsed-light emitting unit to the sample-unit entrance and exit optical systems and/or from the detector to the sample-unit entrance and exit optical systems, one or a plurality of planar mirrors and one or a plurality of aspherical mirrors are disposed in this order.
5 more elements
A time-domain pulsed spectroscopy apparatus comprising:
- a pulsed laser light source;
- a splitting unit configured to split pulsed laser light from the pulsed laser light source into excitation pulsed laser light and detection pulsed laser light;
- a pulsed-light emitting unit configured to emit pulsed light including wavelengths in the far-infrared wavelength region due to irradiation of the excitation pulsed laser;
- a movable reflector for setting the photometric range;
- a detector configured to detect a time-serial signal of the electric field intensity of reflected or transmitted pulsed light from a sample onto which the pulsed light from the pulsed-light emitting unit is radiated;
- a sample holder configured to hold the sample;
- and
- a sample-unit entrance optical system and a sample-unit exit optical systems configured to guide the pulsed light from the pulsed-light emitting unit to the sample and to guide to the detector pulsed light reflected from or transmitted through the sample due to the irradiation,
- wherein, from the pulsed-light emitting unit to the sample-unit entrance optical system, one or a plurality of planar mirrors and one or a plurality of aspherical mirrors are disposed to converge the pulsed light from the pulsed-light emitting unit;
- and
- wherein from the sample-unit exit optical system to the detector, one or a plurality of planar mirrors and one or a plurality of aspherical mirrors are disposed to reduce the focal area focused by the at least one aspherical mirror and to increase spatial resolution of the sample to be measured to the detector.
8 more elements
An auxiliary optical unit for use in a time-domain pulsed spectroscopy apparatus, comprising:
- a sample holder configured to hold the sample;
- a sample-unit entrance optical system;
- and
- a sample-unit exit optical system;
- wherein the auxiliary optical unit has an optical design such that when the auxiliary optical unit is attached to the time-domain pulsed spectroscopy apparatus the sample-unit entrance optical system and the sample-unit exit optical system are in optical alignment with respect to the time-domain pulsed spectroscopy apparatus, the sample-unit entrance optical system comprising one or a plurality of planar mirrors and one or a plurality of aspherical mirrors.
2 more elements
An auxiliary optical unit for use in a time-domain pulsed spectroscopy apparatus, comprising:
- a sample holder configured to hold the sample;
- a sample-unit entrance optical system;
- and
- a sample-unit exit optical system;
- wherein the auxiliary optical unit has an optical design such that when the auxiliary optical unit is attached to the time-domain pulsed spectroscopy apparatus the sample-unit entrance optical system and the sample-unit exit optical system are in optical alignment with respect to the time-domain pulsed spectroscopy apparatus,
- the sample-unit exit optical system comprising one or a plurality of planar mirrors and one or a plurality of aspherical mirrors.
3 more elements
A method of placing a sample in a time-domain pulsed spectroscopy apparatus comprising:
- placing the sample to be tested in a sample holder configured to hold the sample;
- wherein the sample holder is located in an auxiliary optical unit including a sample-unit entrance optical system and a sample-unit exit optical system, the sample-unit entrance optical system comprising one or a plurality of planar mirrors and one or a plurality of aspherical mirrors;
- attaching the auxiliary optical unit to a time-domain pulsed spectroscopy apparatus with a movable reflector for setting the photometric range;
- wherein, when attached, the auxiliary optical unit is designed for optical alignment with respect to the time-domain pulsed spectroscopy apparatus.
1 more element
A method of placing a sample in a time-domain pulsed spectroscopy apparatus comprising:
- placing the sample to be tested in a sample holder configured to hold the sample;
- wherein the sample holder is located in an auxiliary optical unit including a sample-unit entrance optical system and a sample-unit exit optical system, the sample-unit exit optical system comprising one or a plurality of planar mirrors and one or a plurality of aspherical mirrors;
- attaching the auxiliary optical unit to a time-domain pulsed spectroscopy apparatus with a movable reflector for setting the photometric range;
- wherein, when attached, the auxiliary optical unit is designed for optical alignment with respect to the time-domain pulsed spectroscopy apparatus.
1 more element
Dependencies are inferred from the claim text.