公开(公告)号：EP0538252A4

公开(公告)日：1993-11-03

申请号：EP90911030

申请日：1990-07-12

Applicant: BIO-RAD LABORATORIES, INC.

Inventor： CURBELO, RAUL

IPC: G01J3/45 ,  G01J3/00 ,  G01J3/453 ,  G01R23/16 ,  H03M1/08 ,  H03M1/20

CPC classification number: G01J3/453 ,  H03M1/201

Abstract: A technique for improving the resolution of an A/D converter (30). The input analog signal is sampled to generate an analog level and the analog level is held (20) for an interval. A dither signal (22) is superimposed (23) on the held level to generate a fluctuating voltage. This fluctuating voltage is then sampled (25) a plurality of at least N times, and N sampled values are communicated to the A/D converter (30) so that N digitized values are generated. These digitized values are averaged (32) to provide an output having a digitization error reduced by a factor of up to N .

公开(公告)号：EP0501833A3

公开(公告)日：1993-06-16

申请号：EP92301748.7

申请日：1992-02-28

Applicant: RESEARCH-COTTRELL TECHNOLOGIES INC.

Inventor： Ponce, Fred H., c/o Research-Cottrell ,  Pareja, Carlos H., c/o Research-Cottrell ,  Vidrine, Warren D., c/o Research-Cottrell

IPC: G01J3/453 ,  C11D11/04

CPC classification number: G01J3/4537

Abstract: A wedge-type interferometer is supported three-dimensionally by a cast inner shell (180), which contains a readily removable optical cartridge (200) supporting the fixed and movable wedge-shape prisms (78, 74) of the interferometer. The fixed prism is supported from one side of a centerpiece (210) of the cartridge while the movable prism is supported from the other side of the centerpiece for linear, scanning movement. The cartridge may be mechanically and optically aligned prior to insertion into the inner shell, and is easily removed if additional adjustments are required. A first corner cube mirror (82) is supported by a plate (58) secured to one wall of the inner shell and is aligned by micropositioner adjustment in the X-axis. A second corner cube mirror (86) is supported by a plate (64) secured to another wall of the inner shell and is aligned by micropositioner adjustment in the Y-axis. After alignment the inner shell may be mounted in an outer, hermetically-sealed casting (52).

公开(公告)号：EP0491435A3

公开(公告)日：1993-04-14

申请号：EP91203267.9

申请日：1991-12-12

Applicant: Philips Electronics N.V.

Inventor： Bertram, Albert Ralph Johan ,  Coenders, Johannes Wilhelmus ,  Span, Francis Johannes

IPC: G01J3/453 ,  G01J3/02 ,  G02B7/182 ,  G12B5/00 ,  G01M11/04

CPC classification number: G02B7/1825 ,  G01J3/453 ,  G12B5/00

Abstract: An interferometer which may be used in a Fourier transform infra red spectrometer comprises a beam splitter (10), first and second fixed mirrors (18,26), path length variation means (20), and a folding mirror (16). The optical components are mounted on a casting (8) such that the beam splitter (10) and folding mirror (16) are arranged parallel to each other and the fixed mirrors (18,26) are attached to a single face of the casting in the same plane. The path length variation means (20) comprises two parallel opposed mirrors (22,24) which are rotatable to vary the length of the optical path between the beam splitter (10) and the fixed mirror (26).

Abstract translation: 可用于傅里叶变换红外光谱仪的干涉仪包括分束器（10），第一和第二固定镜（18,26），路径长度变化装置（20）和折叠镜（16）。 将光学部件安装在铸件（8）上，使得分束器（10）和折叠反射镜（16）彼此平行布置，并且固定反射镜（18,26）附着到铸件的单个面上 同一架飞机。 路径长度变化装置（20）包括两个平行相对的反射镜（22,24），它们可旋转以改变分束器（10）和固定反射镜（26）之间的光路长度。

公开(公告)号：EP0228702B1

公开(公告)日：1991-06-26

申请号：EP86118013.1

申请日：1986-12-23

Applicant: Bruker Analytische Messtechnik GmbH

Inventor： Fateley, William G.

IPC: G01J3/453 ,  G02F1/17 ,  G02F1/01

CPC classification number: G01J3/453

公开(公告)号：EP0287929A3

公开(公告)日：1990-03-28

申请号：EP88105769.9

申请日：1988-04-12

Applicant: MILES INC.

Inventor： Sandridge, Robert L. ,  Hunt, Robert N.

IPC: G01N21/35 ,  H04N5/30 ,  G01J3/453

CPC classification number: G01J3/02 ,  G01J3/0208 ,  G01J3/453 ,  G01N21/3504 ,  G01N2021/1795 ,  G01N2021/3155 ,  G01N2021/3531

Abstract: A particular area or areas are monitored for the presence of gaseous materials, particularly pollutants by collecting background radiation (both visible and infrared radiation) present in the selected area, analyzing the radiation collected with a spectrometer and making the results of this analysis available in a form understandable to the person or device monitoring the area for the presence of specified gaseous materials. The results of the spectrometric analysis may, for example, be displayed on a video unit or they may be printed. In a preferred embodiment, the results of the spectrometric analysis are displayed on a video unit simultaneously or sequentially with the image of the area from which the background radiation had been collected. Apparatus useful in the practice of this invention generally includes large energy collecting mirrors, an interferometer of the Michaelson-Morely type, a sensitive infrared detector, electronic data processing, and a device which records and/or displays the results of the determination(s). In a preferred apparatus, a "hot" mirror, a video camera, a computer and a video display unit are also employed.

公开(公告)号：EP0162909A4

公开(公告)日：1987-10-19

申请号：EP85900289

申请日：1984-11-14

Applicant: MIDAC CORP

Inventor： AUTH GERALD L

IPC: G01J3/44 ,  G01J3/453 ,  G01J5/08 ,  G01J3/00

CPC classification number: G01J3/4406 ,  G01J3/453 ,  G01N21/6489

Abstract: An apparatus, for photo-luminescent analysis of the surface of crystalline silicon, in which the photons (28) emitted from the sample (14) are passed through a two-beam (or two-arm) interferometer, having the usual beamsplitter (40), fixed mirror (42), and movable mirror (44). The interferometer output (46) is directed to a detector which is a germanium photodiode (50), cooled in a Dewar, which also cools the initial electronic circuitry to which the detector output is input. Using the disclosed apparatus, methods are available for readily eliminating the negative effect of the electron-hole-droplet phenomenon, and for utilizing the no-phonon region of the spectrum to identify otherwise unidentified impurity (or dopant) materials.

公开(公告)号：EP0224196A1

公开(公告)日：1987-06-03

申请号：EP86116059.6

申请日：1986-11-20

Applicant: Erwin Kayser-Threde Gesellschaft mit beschränkter Haftung

Inventor： Rippel, Harald, Dr.Dipl.-Phys.

IPC: G01J3/453

CPC classification number: G01J3/4535

Abstract: Zur Reduktion der Datenrate des bei der Fourierspektroskopie erhaltenen, digitalisierten Meßsignals wird das das Interferogramm darstellende, analoge Signal mit einem zweiten elektrischen Signal gemischt, dessen Frequenz proportional der Abweichung der momentanen Ist-Geschwindigkeit des bewegten Spiegels (3) eines Zweistrahl-Interferometers von dessen konstanter Soll-Geschwindigkeit moduliert ist. Es werden nur die aufgrund der Frequenzmischung erhaltenen Differenzfrequenzen digitalisiert und einem angeschlossenen Rechner zur Auswertung des Interferogramms zugeführt. Das so erhaltene digitale Meßsignal zeichnet sich durch eine wesentlich verminderte Datenrate aus, ohne daß es durch die erfolgte Frequenztransformation mit einem zusätzlichen Fehler behaftet wäre. - Zur Erzeugung des zweiten, frequenzmodulierten elektrischen Signals wird eine Laserquelle (9) benutzt, die einen Laserstrahl parallel zur Meßstrahlung in das Interferometer einstrahlt. Das im Interferometer miterzeugte Interferogramm des Laserstrahls wird mittels eines zweiten opto-elektrischen Wandlers (11) in ein in der gewünschten Weise frequenzmoduliertes elektrisches Signal umgewandelt und einem Frequenzmischer (15) zugeführt.

Abstract translation: 为了减少在傅立叶光谱法获得的测量信号的数据速率，数字化是干涉，执行与具有频率比例常数的双光束干涉仪的移动镜（3）的瞬时实际速度的偏差的第二电信号混合模拟信号其 目标速度被调制。 由于频率获得的差频混合只有数字化并输送到对干涉的评价连接的计算机。 将由此得到的数字测量信号的特征在于显着降低的数据速率，而不会被受频率变换用的附加误差进行。 - 用于产生所述第二频率调制的电信号，一个激光源（9）时，照射平行于干涉仪的测量光束的激光束。 在激光束的干涉的干涉miterzeugte是通过在所希望的方式的频率调制的电信号的第二光 - 电转换器（11）被转换并馈送到一个混频器（15）。

公开(公告)号：EP0171837A2

公开(公告)日：1986-02-19

申请号：EP85201107.1

申请日：1985-07-08

Applicant: PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

Inventor： Perkins, Charles Vincent ,  Wilson, James Brian

IPC: G01J3/453

CPC classification number: G01J3/453 ,  G01J3/02 ,  G01J3/0202 ,  G01J3/0286 ,  G01J3/0291 ,  G01M11/04 ,  G02B7/00 ,  G12B7/00

Abstract: Rigid supporting structures for the components of high precision optical instruments, such as interferometers or monochromators, have hitherto been based on massive castings. Such castings suffer from residual non-recoverable changes of shape during temperature cycling, due to the differential temperatures set up in the castings. The invention provides a rigid structure assembled from a number of flat sheet structural elements 51,52,57,64. Each sheet element is substantially rigid in its own plane and is attached to one or more other sheets at points of contact which are such that the edge of one sheet bears against the surface of another sheet, the planes of the two sheets being perpendicular in the region of the points of contact. An open ended rectangular box structure 50 may be assembled from two sheets 51,52, each with a single right angled fold. Each point of contact and attachment may be formed as a foot 53,54,55,56,58,59,77,62,63,80 standing proud from the remainder of the sheet edge.

公开(公告)号：EP0171836A2

公开(公告)日：1986-02-19

申请号：EP85201106.3

申请日：1985-07-08

Applicant: PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

Inventor： Perkins, Charles Vincent

IPC: G01J3/453

CPC classification number: G01J3/453 ,  G01J3/02 ,  G01J3/0202 ,  G01J3/0286 ,  G01J3/0291

Abstract: In beam splitting interferometers for use in Fourier transform spectrometers working in the infra-red region from 2.5 microns to 50 microns wavelength, it is impossible to provide a single beam splitting assembly which is efficient over the whole wavelength range, due to the limitations of available materials. In a set of interchangeable beam splitters it Is difficult to ensure sufficiently accurate registration of each beam splitter after a change. The invention provides a set of beam splitters 4,5 held stationary in separated locations and radiation directing means 2, 3, 26, 28 which passes an input beam 12,13 through a beam splitter, which selects the recombined beam 23 or 24 emerging from a desired beam splitter, and which passes it to a detector 25 in a fixed location.

公开(公告)号：EP4058784B1

公开(公告)日：2025-03-19

申请号：EP19832170.5

申请日：2019-11-15

Inventor： FOREMAN, Liberty ,  FARR, Lance

IPC: G01N21/35 ,  G01N33/50 ,  G01N15/14 ,  G01J3/453 ,  G01N21/65 ,  G01N15/10