This relates to an optical system for detecting radiation from a measuring area, comprising at least one radiation source for generating radiation along an excitation beam path which guides radiation from the radiation source to the measuring area, and comprising a detection beam path which guides radiation from the measuring area to at least a first and a second detector, wherein along the detection beam path, exactly one tube lens having a first end and an opposite second end, a first beam splitter, a first detector in the reflection direction of the first beam splitter, and a second detector in the transmission direction of the first beam splitter are arranged in succession, wherein the first detector has a first detection surface and the second detector has a second detection surface which is spaced from the first detection surface, and the first and second detection surfaces are arranged along the detection beam path at the same distance from the second end of the tube lens.

In an optical device, a base and a movable unit are constituted by a semiconductor substrate including a first semiconductor layer, an insulating layer, and a second semiconductor layer in this order from one side in a predetermined direction. The base is constituted by the first semiconductor layer, the insulating layer, and the second semiconductor layer. The movable unit includes an arrangement portion that is constituted by the second semiconductor layer. The optical function unit is disposed on a surface of the arrangement portion on the one side. The first semiconductor layer that constitutes the base is thicker than the second semiconductor layer that constitutes the base. A surface of the base on the one side is located more to the one side than the optical function unit.

An optical module includes a mirror unit and a beam splitter unit. The mirror unit includes a base with a main surface, a movable mirror, a first fixed mirror, and a drive unit. The beam splitter unit constitutes a first interference optical system for measurement light along with the movable mirror and the first fixed mirror. A mirror surface of the movable mirror and a mirror surface of the first fixed mirror follow a plane parallel to the main surface and face one side in a first direction perpendicular to the main surface. The movable mirror, the drive unit, and at least a part of an optical path between the beam splitter unit and the first fixed mirror are disposed in an airtight space.

A mirror unit 2 includes a mirror device 20 including a base 21 and a movable mirror 22, an optical function member 13, and a fixed mirror 16 that is disposed on a side opposite to the mirror device 20 with respect to the optical function member 13. The mirror device 20 is provided with a light passage portion 24 that constitutes a first portion of an optical path between the beam splitter unit 3 and the fixed mirror 16. The optical function member 13 is provided with a light transmitting portion 14 that constitutes a second portion of the optical path between the beam splitter unit 3 and the fixed mirror 16. A second surface 21b of the base 21 and a third surface 13a of the optical function member 13 are joined to each other.

The invention relates to the field of laser technology and can be used for more efficient optical pumping of laser media in laser generators and amplifiers. The invention can be used for the efficient optical pumping of practically all types of lasers, provided that the absorption profile of the pumped medium is sufficiently broadband. The invention discloses a method and device for combining at least two laser beams of different wavelengths, the polarization states of which are substantially orthogonal, into an exit beam by using a polarizing beamsplitter which spatially combines two beams in mutually orthogonal polarization states, and then changing the polarization state of one of the beams relative to the other using a spectrally selective polarization filter such that the polarization state of the exit beam becomes substantially identical for all of the wavelengths of the exit beam, thus permitting the subsequent combining thereof with another beam.

Particular embodiments disclosed herein provide a surgical laser system comprising first laser source configured to emit a first laser beam with a first wavelength and a second laser source configured to emit a second laser beam with a second wavelength. The surgical laser system further comprises a first diffraction optical element (DOE) tuned to the first wavelength and a second DOE tuned to the second wavelength, wherein the first DOE is configured to diffract the first laser beam into one or more first diffracted beams at a diffraction angle and the second DOE is configured to diffract the second laser beam into one or more second diffracted beams at the same diffraction angle. The surgical laser system further comprises one or more beam splitters configured to reflect the one or more first diffracted beams and the one or more second diffracted beams onto a lens.

A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

An optical module includes a mirror unit and a beam splitter unit. The mirror unit includes a base with a main surface, a movable mirror, a first fixed mirror, and a drive unit. The beam splitter unit constitutes a first interference optical system for measurement light along with the movable mirror and the first fixed mirror. A mirror surface of the movable mirror and a mirror surface of the first fixed mirror follow a plane parallel to the main surface and face one side in a first direction perpendicular to the main surface. The movable mirror, the drive unit, and at least a part of an optical path between the beam splitter unit and the first fixed mirror are disposed in an airtight space.

An optical module includes a mirror unit and a beam splitter unit. The mirror unit includes a base with a main surface, a movable mirror, a first fixed mirror, and a drive unit. The beam splitter unit constitutes a first interference optical system for measurement light along with the movable mirror and the first fixed mirror. A mirror surface of the movable mirror and a mirror surface of the first fixed mirror follow a plane parallel to the main surface and face one side in a first direction perpendicular to the main surface. The movable mirror, the drive unit, and at least a part of an optical path between the beam splitter unit and the first fixed mirror are disposed in an airtight space.

An optical module includes: a mirror unit that includes a movable mirror and a fixed mirror, a beam splitter unit that constitutes an interference optical system in combination with the movable mirror and the fixed mirror; a light incident unit that causes measurement light to be incident to the beam splitter unit; a first light detector that detects interference light of the measurement light; a second light source that emits laser light; a second light detector that detects interference light of the laser light; a first mirror that has a function of allowing the measurement light to be transmitted therethrough and reflecting the laser light; a second mirror that has a function of reflecting a part of the laser light and allowing the remainder of the laser light to be transmitted therethrough; a third mirror that has a function of reflecting the laser light; and a first filter that has a function of allowing the measurement light to be transmitted therethrough and cutting off the laser light, and is disposed between the first mirror and the first light detector.