公开(公告)号：US4549080A

公开(公告)日：1985-10-22

申请号：US505387

申请日：1983-06-17

Applicant: Lowell L. Baskins ,  James M. Keene ,  John G. Montfort

Inventor： Lowell L. Baskins ,  James M. Keene ,  John G. Montfort

IPC: G01J1/02 ,  G01J1/18 ,  G01J1/44 ,  G01N21/03 ,  G01N21/35 ,  G01N21/53 ,  G01J1/00

CPC classification number: G01N21/3504 ,  G01J2001/182 ,  G01J2001/4242 ,  G01N2021/536 ,  G01N21/0332 ,  G01N2201/0216 ,  G01N2201/1245 ,  G01N2201/1283

Abstract: A mixture of H.sub.2 O, CO.sub.2 and CO are measured in the same sample chamber by infrared radiation passing through the chamber and absorption filters passing a narrow band in their respective absorption curves to an infrared detector. Background radiation is zeroed by grounding the detector response when an opaque segment is disposed in the path. A reference filter detects drift which is automatically corrected.

Abstract translation: 通过红外辐射通过室和吸收滤光片在相同的样品室中测量H 2 O，CO 2和CO的混合物，吸收滤光片通过其各自的吸收曲线中的窄带到红外检测器。 当不透明段设置在路径中时，通过将检测器响应接地来对背景辐射进行归零。 参考滤波器检测自动校正的漂移。

公开(公告)号：US4037970A

公开(公告)日：1977-07-26

申请号：US653848

申请日：1976-01-30

Applicant: Donald R. Webster ,  Eugene R. Ganssle

Inventor： Donald R. Webster ,  Eugene R. Ganssle

IPC: G01J1/18 ,  G01J3/12 ,  G01J3/28 ,  G01N21/31 ,  G01N21/35 ,  G01N33/10 ,  G01J3/48

CPC classification number: G01N21/314 ,  G01N33/10 ,  G01J2001/182 ,  G01J2003/1243 ,  G01J2003/2866 ,  G01N2021/3129 ,  G01N2021/3159 ,  G01N2021/4769 ,  G01N21/35 ,  G01N21/3563 ,  G01N21/4738 ,  G01N2201/1283

Abstract: An automatic test instrument for gaging the percentage of various constituents in organic substances by comparing the reflective optical density of the subject at various wavelengths. Narrow band optical filters are connected together in the form of a rotatable paddle wheel positioned so that the filters can be individually swept through the incident light path between the specimen and wideband light source. As the filter wheel turns, the band of light passed by each filter is progressively shifted with the changing angle of the filter relative to the light path. The filter wheel configuration includes opaque vanes extending from the ends of the filters to periodically interrupt the passage of light to the specimen. Photocells are positioned to sense the level of light reflected from the specimen. The output of the photocells is sampled at predetermined times relative to the rotation of the filter wheel to yield values indicative of reflected intensity at certain wavelengths. Using these values, an electronic circuit in one embodiment calculates three optical density difference values corresponding to moisture, protein and oil content of the specimen. The difference values are automatically inserted in three linear equations which are solved to obtain readings representing the true percentages of oil, water and protein contained in the specimen. Each time a new specimen is loaded for testing, the instrument is automatically calibrated against a standard sample, preferably Teflon (Trademark). The output of the photocells is amplified in a special circuit which subtracts the level of dark period current from the output when the photocells are illuminated.

公开(公告)号：US4017192A

公开(公告)日：1977-04-12

申请号：US547658

申请日：1975-02-06

Applicant: Robert D. Rosenthal

Inventor： Robert D. Rosenthal

IPC: A61B5/00 ,  G01J1/18 ,  G01J3/12 ,  G01N21/31 ,  G01N21/35 ,  G01N21/59 ,  G01N21/22

CPC classification number: A61B5/0059 ,  G01N21/314 ,  G01J2001/182 ,  G01J2003/1243 ,  G01N21/35 ,  G01N21/59

Abstract: A technique for automatic detection of abnormalities, particularly pathology, in biomedical specimens. Light transmittance or reflectance data over a large number of wavelengths for numerous samples are correlated mathematically with conventional clinical results to select test wavelengths and constants for a correlation equation. Optical instrumentation with an analog or digital computer applies the resulting correlation equation to the spectral data on a given specimen at the test wavelengths to determine quantitatively the presence of the abnormality.

Abstract translation: 用于自动检测生物医学标本中的异常特别是病理学的技术。 对于许多样品，大量波长上的透光率或反射率数据与常规临床结果数学相关，以选择相关方程的测试波长和常数。 使用模拟或数字计算机的光学仪器将所得的相关方程应用于在测试波长处的给定样本上的光谱数据，以确定定量存在异常。