12 results about "Fabry–Pérot interferometer" patented technology

The invention provides a Fabry-Perot interferometer measurement system based on three-pole-plate double-cavity cascade, and relates to the technical field of optical precision measurement, the system comprises an optical fiber coupling laser light source with an optical path protection device, an optical fiber collimator, an F-P interferometer and an optical fiber coupling optical detector, and adopts a double-interference-cavity cascade structure of three parallel pole plates; wherein the three parallel polar plates consist of a first fixed plate, a middle movable plate and a second fixed plate; a first interference cavity is formed between the first fixed plate and the middle movable plate, and a second interference cavity is formed between the middle movable plate and the second fixed plate. The limitation of a traditional single cavity is broken through, a double-interference-cavity cascade system is constructed by introducing the middle movable polar plate, the introduction of the middle polar plate not only expands a single cavity into two interference cavities which work cooperatively, but also realizes dynamic coupling modulation of the optical path difference through the mechanical mobility of the polar plate.

The invention relates to a Fabry-Perot interferometer used for a satellite optical system and coupled with a telescope, an elastic support part comprises an elastic supporter, a push rod and a pressing ring, a heat preservation part comprises a mirror chamber, a temperature thermocouple, a heating sheet and a thermal control thermal insulation layer, the mirror chamber surrounds the outer periphery of an optical element, and the temperature thermocouple is arranged in the mirror chamber. The heating sheet surrounds the periphery of the outer side of the mirror chamber, the thermal control thermal insulation layer wraps the heating sheet to play a role in heat preservation and insulation protection, and the base part comprises a soft rubber buffer gasket and a base and is used for supporting and fixing an interferometer. An image received from a satellite telescope passes through a Fabry-Perot interferometer before being transmitted to a focal plane component detector to form an interference pattern of concentric rings, and each interference fringe represents a different wavelength. The invention is a wide-angle Fabry-Perot interferometer having a large aperture, which can maximize the optical throughput and high fineness, thereby providing high spectral resolution, enabling the measurement of precise wavelengths in each pixel of the detector.

A system includes a top mirror, a bottom mirror, a top spacer mesa, a bottom spacer mesa, and an adhesive. The top mirror is added to a top substrate. The bottom mirror is added to a bottom substrate. The top spacer mesa is added to the top substrate. The bottom spacer mesa is added to the bottom substrate. The adhesive is affixed between a) the top substrate or a top support element and b) the bottom substrate or a bottom support element or a piezo actuator.

A micro-electro-mechanical (MEMS) Fabry-Perot interferometer (100), comprising a transparent substrate (110); the first metal mirror structure (120) is located on the transparent substrate (110) and comprises a first metal layer (121) and first supporting layers (122-123); a second metal mirror structure (130), taking into account the transparent substrate (110), located on opposite sides of the first metal mirror structure (120), above the first metal mirror structure (120), the second metal mirror structure (130) comprising a second metal layer (131) and a second support layer (132-133), wherein the first support layer (122-123) and the second support layer (132-133) are parallel and comprise at least one of alumina or titanium dioxide; a Fabry-Perot cavity (140) located between the first support layer (122-123) and the second support layer (132-133), where the Fabry-Perot cavity (140) is formed by providing an insulating layer (141) on the first mirror structure (120) and at least partially removing the insulating layer (141) after providing the second mirror structure (130); an electrode (150-151) for providing an electrical contact to the first metal layer (121) and the second metal layer (131).

Apparatus and methods are described including illumination equipment (300) configured to direct light into an eye of a subject. An optical device (100) is placed inside the subjects eye, the optical device including a Fabry Perot interferometer (106) comprising at least two mirrors (162, 164), the Fabry Perot interferometer (106) being configured such that a distance between the mirrors (162, 164) varies as an intraocular parameter of the subjects eye varies. A retroreflector (140) is configured such that light that is transmitted through the Fabry Perot interferometer (106) is automatically reflected out of the subjects eye. Readout equipment (400) is configured to detect the light that is reflected out of the subjects eye. Other applications are also described.

A method for producing a Fabry-Perot interferometer (FPI1) comprises: - forming a first module (MOD1), which comprises a first actuating electrode (E1), - forming a second module (MOD2), which comprises a movable mirror (M2) and a second actuating electrode (E2), and - bonding the first module (MOD1) to the second module (MOD2), wherein the first actuating electrode (E1) and the second actuating electrode (E2) are arranged to change the distance (dM) between the mirrors (M1, M2) of the interferometer (FPI1),10 wherein dimensions of the modules (MOD1, MOD2) are selected such that a distance (dE) between the first electrode (E1) and the second electrode (E2) is greater than or equal to 1.5 times a distance (dM) between the mirrors (M1, M2).

To manufacture a Fabry-Perot interferometer easily.SOLUTION: A first substrate 110 includes, on a first principal surface 111, a first reflection surface part 112 and a first reference surface part 113 positioned round the first reflection surface part 112. A second substrate 120 includes, on a second principal surface 121, a second reflection surface part 122 facing the first reflection surface part 112 with a gap L, and a second reference surface part 123 positioned around the second reflection surface part 122. A drive mechanism part 130 displaces the second reflection surface part 122 with respect to the first reflection surface part 112 in a state where the second reflection surface part 122 faces the first reflection surface part 112. An adhesion layer 140 contains at least three spacer particles 141 which are held between the first reference surface part 113 and the second reference surface part 123 for regulating a fixed gap D between the first reference surface part 113 and the second reference surface part 123.SELECTED DRAWING: Figure 2

Fabry-Perot interferometer-based optical imaging system for use in detecting atmospheric trace gas emissions from specific target locations that addresses the back reflecting problem of conventional systems. The system comprises a wide-angle Fabry-Perot interferometer that is tilted such that a surface normal of the interferometer gap is at an angle Θ with respect to the angle of incidence that corresponds to zero field angle. In some implementations, the tilt direction is positive; in other implementations, the tilt direction is negative. The tilt angle is preferably larger than half of the angular spread (i.e., angle-of-incidence range) at the position of the Fabry-Perot interferometer in the imaging system. In some embodiments, the system comprises a shutter for blocking the input light aperture. In some embodiments, the system comprises an on-board calibration light source. In one aspect, an output of the system is partitioned into a plurality of data subsets.

The present invention relates to an optical dual Fabry-Perot interferometer film, and more particularly to a technique for enhancing color purity using a dual cavity layer. An optical dual Fabry-Perot interferometer film according to an embodiment of the present invention includes a first anti-reflection layer, a second anti-reflection layer formed on the first anti-reflection layer, and first and second cavity regions formed between the first and second anti-reflection layers.

The invention provides a narrow-linewidth millimeter wave terahertz spectrum measurement device and method based on a Fabry-Perot interferometer. The narrow-linewidth millimeter wave terahertz spectrum measurement device comprises the Fabry-Perot interferometer, a terahertz lens, a power detection device and a linewidth analysis device, a radiation signal of a radiation source to be measured passes through the terahertz lens and the Fabry-Perot interferometer to generate a focusing signal; the focusing signal is input to the power detection device for spectral analysis of the radiation signal, and the focusing signal is input to the line width analysis device for line width analysis of the radiation signal. The problems that in the prior art, the coverage range of millimeter wave and terahertz wave spectrum measurement power is small, the requirement for the environment is high, and narrow linewidth measurement of high-frequency-band radiation is difficult to carry out are solved.

An apparatus (500) for spectral measurements comprises: - a Fabry-Perot interferometer (FP1) having an adjustable mirror gap (dGAP), and - a control unit (CNT1) for controlling the mirror gap (dGAP), wherein the apparatus (500) is arranged to: - set the mirror gap (dGAP) to a first mirror gap value (dGAP,1) to provide a first spectral transmittance peak (P1,A) at a first wavelength (λA), wherein the first spectral transmittance peak (P1,A) has an effective spectral width (Δλ1,A,EFF), - change the mirror gap (dGAP) to a second different mirror gap value (dGAP,2) to provide a second spectral transmittance peak (P2,A) at the first wavelength (λA), and a third spectral transmittance peak (P1,C) at a second wavelength (λC), and - control the position of a mirror (M2) of the Fabry-Perot interferometer (FP1) near the second different mirror gap value (dGAP,2) such that the effective spectral width (Δλ2,A,EFF) of the second spectral transmittance peak (P2,A) is substantially equal to the effective spectral width (Δλ1,A,EFF) of the first spectral transmittance peak (P1,A).

A system includes a top mirror, a bottom mirror, a top spacer mesa, a bottom spacer mesa, and an adhesive. The top mirror is added to a top substrate. The bottom mirror is added to a bottom substrate. The top spacer mesa is added to the top substrate. The bottom spacer mesa is added to the bottom substrate. The adhesive is affixed between a) the top substrate or a top support element and b) the bottom substrate or a bottom support element or a piezo actuator.