公开(公告)号：EP0193742A3

公开(公告)日：1988-08-03

申请号：EP86101421

申请日：1986-02-04

Applicant: HITACHI, LTD.

Inventor： Tatsuno, Kimio ,  Tsunoda, Yoshito ,  Ohtake, Masatoshi ,  Kataoka, Keiji ,  Yonezawa, Seiji

IPC: G01J09/02 ,  G01J03/45

CPC classification number: G01J9/04 ,  G01J3/45

Abstract: in a laser diode heterodyne interferometry, a light beam from a laser diode (1) is divided in two, one of which is used as a reference beam and the other of which is used as an inspecting beam, and the two beams are projected again on an identical plane so as to form an interference pattern. The injection current of the laser diode (1) is modulated to scan the interference pattern, and a photocurrent obtained from each element of a photosensor array (6) which receives an intensity variation of the interference pattern is divided by a monitored current of a light output of the laser diode (1), to obtain a photocurrent signal of normalized interference pattern intensity variation.

公开(公告)号：WO1991016606A1

公开(公告)日：1991-10-31

申请号：PCT/JP1991000506

申请日：1991-04-17

Applicant: ADVANTEST CORPORATION ,  MATSUMURA, Takashi

Inventor： ADVANTEST CORPORATION

IPC: G01J03/45

CPC classification number: G01J3/4535

Abstract: A reference beam is allowed to be incident into a Michelson interferometer and a reference interference electric signal which changes sinusoidally with the movement of a movable reflector (14) in accordance with interference of the reference beam is obtained. A control circuit (21) applies a direction control signal representing the direction of the movement of the movable reflector (14) to a two-phase signal generator (32B). In response to the indicated direction, this generator generates a two-phase signal either one of the phases of which is advanced by 90°, and applies this two-phase signal as a feedback signal to a servo driving circuit (19). The control circuit (21) applies a movement control signal to the servo driving circuit (19) and controls the movement of the movable reflector (14), so that high precision control becomes possible in accordance with accuracy of the wavelength of the reference beam.

公开(公告)号：WO1995001554A1

公开(公告)日：1995-01-12

申请号：PCT/US1994007184

申请日：1994-06-24

Applicant: FIRST MEDICAL, INC. ,  GUSTAFSON, Eric, K. ,  ALLEN, Jimmy, D. ,  COBB, Michael, E.

Inventor： FIRST MEDICAL, INC.

IPC: G01J03/45

CPC classification number: G01N21/45 ,  G01N21/75 ,  G01N2021/1748 ,  G01N2021/1759 ,  G01N2021/752 ,  Y10S435/97

Abstract: Apparatus (10) and method for detecting and measuring analyte in biological and other sample solutions. A substrate (20) is provided with at least one active region which specifically binds analyte and an inactive region that does not, and a change in optical path length through the active region due to binding of analyte is measured. The substrate (20) is inserted into one or both beams of an interferometer (10) and moved relative to the interferometer (10). As the substrate (20) moves, the active and inactive regions pass successively through the beam(s) causing a periodic phase shift in the light. When the beams, one or both of which have undergone phase modulation, are recombined with each other, the phase modulation is converted into an amplitude modulation. Each recombined beam is directed to a photodetector (42, 45), which converts the periodically varying optical power into a periodically varying electrical signal. This signal has an amplitude proportional to the amount of bound analyte on the surface of the substrate (20) and a signal frequency equal to that at which the active regions move past the beam(s) in the interferometer (10). Servo control (60, 62, 65) is used to maintain the interferometer at a desired operating point that maximizes the sensitivity and linearity of the system so that the small phase differences due to analyte binding can be measured more accurately.

Abstract translation: 用于检测和测量生物样品和其他样品溶液中分析物的装置（10）和方法。 衬底（20）设置有至少一个特异性结合被分析物的活性区域和不受分析物结合的活性区域的光路长度的变化，并且由于分析物结合而导致的光路长度的变化。 衬底（20）插入干涉仪（10）的一个或两个光束并相对于干涉仪（10）移动。 当衬底（20）移动时，有源和无源区域依次通过光束，导致光中的周期性相移。 当其中一个或两个已进行相位调制的波束彼此重新组合时，相位调制被转换成幅度调制。 每个重新组合的光束被引导到光电检测器（42,45），其将周期性变化的光功率转换成周期性变化的电信号。 该信号具有与衬底（20）表面上结合的分析物的量成比例的幅度和等于有源区移动通过干涉仪（10）中的束的信号频率的信号频率。 伺服控制（60,62,65）用于将干涉仪保持在使系统的灵敏度和线性度最大化的期望工作点，从而可以更准确地测量由分析物结合引起的小的相位差。

公开(公告)号：WO1990012294A1

公开(公告)日：1990-10-18

申请号：PCT/US1990001813

申请日：1990-04-04

Applicant: WISCONSIN ALUMNI RESEARCH FOUNDATION

Inventor： WISCONSIN ALUMNI RESEARCH FOUNDATION ,  ROESLER, Fred, L. ,  HARLANDER, John

IPC: G01J03/45

CPC classification number: G01J3/453 ,  G01J2003/451 ,  G01J2009/0219

Abstract: A spatial heterodyne spectrometer has a two beam dispersive interferometer (25) which includes a diffraction grating (45) as a beam splitter/combiner. An incoming beam is collimated and passed to the grating (45) in the interferometer (25) where it is split into two beams (47, 50) which are recombined such that the angle between the wavefronts in the recombined beam at a particular wavelength is directly related to the deviation of that wavelength from a null wavelength at which the wavefronts are parallel. The recombined output beam is focused and imaged to produce Fizeau fringes across the output aperture (31), with these fringes being recorded on an imaging detector (34). The spatially varying intensity output of the imaging detector (34) is Fourier transformed to yield an output indicative of the spectral frequency content of the image which is related to the wavelength content of the incoming beam from the source.

公开(公告)号：WO1995024619A1

公开(公告)日：1995-09-14

申请号：PCT/SE1995000248

申请日：1995-03-09

Applicant: OPSIS AB ,  LARSSON, Kaj

Inventor： OPSIS AB

IPC: G01J03/45

CPC classification number: G01J3/453

Abstract: An interferometer comprises a beam splitter (BS) and two scanning mirrors (M1, M2), which are parallel and disposed on a common slide member that can be linearly displaced. The interferometer further comprises two compensating mirrors (M3, M4), which are disposed between the beam splitter (BS) and the scanning mirrors (M1, M2). The beam splitter (BS) and each of the compensating mirrors (M3, M4) are orthogonal. The interferometer has good tolerance for displacement inaccuracies of the scanning mirrors (M1, M2). The interferometer may be used for producing a compact and inexpensive Fourier transform spectrometer.

Abstract translation: 干涉仪包括分束器（BS）和两个扫描反射镜（M1，M2），其平行并设置在公共滑动构件上，其可以线性移位。 干涉仪还包括两个补偿镜（M3，M4），它们设置在分束器（BS）和扫描镜（M1，M2）之间。 分束器（BS）和每个补偿镜（M3，M4）是正交的。 干涉仪对扫描镜（M1，M2）的位移不准确性具有良好的公差。 干涉仪可用于制造紧凑而廉价的傅里叶变换光谱仪。

公开(公告)号：WO1998002720A1

公开(公告)日：1998-01-22

申请号：PCT/DK1997000299

申请日：1997-07-04

Applicant: FOSS ELECTRIC A/S ,  LARSEN, Hans

Inventor： FOSS ELECTRIC A/S

IPC: G01J03/45

CPC classification number: G01J3/453

Abstract: An interferometer for Fourier spectroscopy, wherein the interferometer comprises a beamsplitter (14) and two retroreflectors (20, 26), characterized in that the beamsplitter (14) is mounted movably, e.g., mounted pivotally or displacably, while both retroreflectors (20, 26) are arranged as fixed retroreflectors. The proposed structure is simple to produce, can be made substantially insensible to environmental vibrations, and it is well suited for routine measurements for the determination of quantities of predefined components in a medium. The interferometer is particularly intended for measurements in the mid- or near-infrared range for determination of the quantities of specified components in a medium, and more specifically in a food product, e.g., a liquid such as milk.

Abstract translation: 一种用于傅立叶光谱的干涉仪，其中所述干涉仪包括分束器（14）和两个后向反射器（20,26），其特征在于，分束器（14）可移动地安装，例如可枢转地或可置换地安装，同时两个回射器 ）被布置为固定的后向反射器。 所提出的结构生产简单，可以对环境振动基本上不敏感，并且非常适合用于确定介质中预定组分的量的常规测量。 该干涉仪特别用于在中等或近红外范围内的测量，用于确定介质中特定组分的量，更确切地说在食品中，例如液体如牛奶。

公开(公告)号：WO1996029582A1

公开(公告)日：1996-09-26

申请号：PCT/CA1996000162

申请日：1996-03-20

Applicant: SCI-TEC INSTRUMENTS INC.

Inventor： SCI-TEC INSTRUMENTS INC. ,  IVANOV, Evgeniy Vladimirovich

IPC: G01J03/45

CPC classification number: G01J3/45

Abstract: A method of correlation interferometry analyzes only radiation in a predetermined spectral region where target gases absorb. Data is processed entirely in the interferometric domain. The interferometric response at these values is functionally dependent on the concentration of the investigated gas. The present invention allows one to increase the sensitivity of measurements of the concentrations of target gases with known spectrum contained in the investigated gas medium without greatly sacrificing selectivity, while sampling over only a subset of intervales required for Fourier spectroscopy.

Abstract translation: 相关干涉测量方法仅分析目标气体吸收的预定光谱区域中的辐射。 数据完全在干涉测量领域进行处理。 这些值的干涉响应在功能上取决于所研究气体的浓度。 本发明允许使用所研究的气体介质中包含的已知光谱的目标气体的浓度的测量的灵敏度提高，而不会极大地牺牲选择性，同时只在傅立叶光谱所需的间隔的子集上进行采样。

公开(公告)号：WO1996011387A1

公开(公告)日：1996-04-18

申请号：PCT/FI1995000503

申请日：1995-09-15

Applicant: KAUPPINEN, Jyrki

IPC: G01J03/45

CPC classification number: G01J3/4532

Abstract: The invention relates to an interferometer comprising a beamsplitter (10), a mirror (11) for retroreflecting beams (S1, S2), at least one pair of mirrors (12, 13) made up of two plane mirrors for reflecting the beams (S1, S2). The pair of mirrors (12, 13) is fitted in a rigid structure (15), which is arranged to rotate around an axis (A). It is characteristic that the beamsplitter (10) is attached to a body (20) supported on the mount and that the axis (A) passes through the body (20). According to a recommended embodiment, the retroreflecting mirror (11) is also attached to the body (20).

Abstract translation: 本发明涉及一种干涉仪，包括分束器（10），用于回射光束（S1，S2）的反射镜（11），由两个平面反射镜构成的至少一对反射镜（12,13），用于反射光束 ，S2）。 一对反射镜（12,13）装配在刚性结构（15）中，刚性结构（15）被布置为围绕轴线（A）旋转。 其特征在于，分束器（10）附接到支撑在支架上的主体（20），并且轴线（A）穿过主体（20）。 根据推荐的实施例，回射反射镜（11）也附接到主体（20）。