8 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.

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.

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.

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.