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    • 61. 发明公开
    • Two-wavelength type respiratory gas concentration measuring apparatus
    • 双波长类型呼吸气浓度测量装置
    • EP0385256A3
    • 1991-10-16
    • EP90103363.9
    • 1990-02-21
    • Nihon Kohden Corporation
    • Kurahashi, MuneshigeKato, Naoki
    • G01N21/31A61B5/00
    • G01N21/314A61B5/0836G01J2001/161G01J2001/1684G01J2001/1689G01J2001/444G01N21/3504G01N2021/317
    • A two-wavelength type respiratory gas concentration measuring device includes a connector tube (22) which is held in the mouth of an examinee (1) and which has airtight windows (23), a light source (24) which applies infrared rays through the windows (23) of the connector tube (22), and first and second filters (27, 28). The first filter (27) allows the transmission of a light component whose wavelength is such that it is absorbed by the respiratory gas, and the second filter (28) allows the transmission of a light component whose wavelength is such that it is not absorbed by the respiratory gas. A photodetector (30) converts the infrared rays transmitted through the filters (27, 28) into an electric signal. A first detector (31) receives the electric signal and detects the light output of the first filter (27). A second detector (32) receives the electric signal and detects the light output of the second filter (28). A power computing circuit (33) performs a power computation of the output of the second detector (32) with a power exponent m . A divider circuit (34) divides the output of the first detector (31) by the output of the first power computing circuit (33). A DC level detector (36) detects the DC level of the photodetector (30) when no infrared rays are applied. A second power computing circuit (37) performs a power computation of the output of the DC-level detector (36) with a power exponent of 2(m-­1). A multiplier circuit (38) multiplies the output of the second power computing circuit (37) by the output of the divider (34).
    • 66. 发明公开
    • A dual beam full spectrum multichannel spectrophotometer
    • Ein Zweistrahl-Vollspektrum-Mehrkanal-Spektralphotometer。
    • EP0497434A2
    • 1992-08-05
    • EP92201182.0
    • 1989-02-14
    • APPLIED BIOSYSTEMS, INC.
    • Sapp, Edwin R.Kinast, Eric K.
    • G01N21/27G01J1/16G01J3/42
    • G01N21/27G01J3/2803G01J3/42G01J2001/161G01J2001/1673G01N30/74G01N2201/1232G01N2201/126
    • The present invention relates to an improved dual beam multichannel spectrophotomer employing a simple and novel optical system in combination with photodiode arrays and a unique logrithmic data converter to convert light signals to absorbance. In particular, the optical system utilizes optical elements in a novel arrangement to direct a pair of equivalent sample and reference beams in an essentially parallel formation respectively through a sample and reference cell and to focus and direct the emergent sample and reference beams to a single flat horizonatally ruled grating which disperses each of the sample and reference beams respectively onto a pair of vertically disposed photodiode arrays whereby the light signals are converted into absorbance units (AU) by an unique logarithmic data converter. The spectrophotometer is highly accurate, has very low drift, less than 2 x 10⁻⁴ AU/°C, and very low noise, less than ±2 x 10⁻⁵AU. The dual beam multichannel spectrophotomer is particularly suitable for use in high pressure liquid chromatography to record the absorbance spectrum of the samples as they are being eluted from the chromatographic column.
    • 本发明涉及一种改进的双光束多通道分光光度计,其采用与光电二极管阵列组合的简单且新颖的光学系统以及将光信号转换成吸光度的唯一的对数数据转换器。 特别地,光学系统利用新颖的布置中的光学元件来分别通过样品和参考单元引导基本上平行的一对等效样品和参考光束,并将出射样品和参考光束聚焦并引导到单个平面 分别将每个样品和参考光束分散在一对垂直设置的光电二极管阵列上,由此光信号通过独特的对数数据转换器转换成吸光度单位(AU)。 分光光度计是高精度的,具有非常低的漂移,小于2×10 -4 AU /℃,噪音非常低,小于+/- 2×10 <5> AU。 双光束多通道分光光度计特别适用于高压液相色谱,以记录样品从色谱柱中洗脱的吸收光谱。
    • 70. 发明公开
    • A dual beam multichannel spectrophotometer with a unique logarithmic data converter
    • Zweibündel-Mehrkanal-Spektralphotometer mit einem einzigen logarithmischen Datenumsetzer。
    • EP0329061A2
    • 1989-08-23
    • EP89102478.8
    • 1989-02-14
    • APPLIED BIOSYSTEMS, INC.
    • Sapp, Edwin R.Kinast, Eric K.
    • G01N21/27G01J1/16G01J3/42
    • G01N21/27G01J3/2803G01J3/42G01J2001/161G01J2001/1673G01N30/74G01N2201/1232G01N2201/126
    • The present invention relates to an improved dual beam multichannel spectrophotomer employing a simple and novel optical system in combination with photodiode arrays and a unique logrithmic data converter to convert light signals to absorbance. In particular, the optical system utilizes optical elements in a novel arrangement to direct a pair of equivalent sample and reference beams in an essentially parallel formation respectively through a sample and reference cell and to focus and direct the emergent sample and reference beams to a single flat horizontally ruled grating which disperses each of the sample and reference beams respectively onto a pair of vertically disposed photodiode arrays whereby the light signals are converted into absorbance units (AU) by an unique logarithmic data converter. The spectrophotometer is highly accurate, has very low drift, less than 2 x 10⁻⁴ AU/°C, and very low noise, less than ±2 x 10⁻⁵AU. The dual beam multichannel spectrophotomer is particularly suitable for use in high pressure liquid chromatography to record the absorbance spectrum of the samples as they are being eluted from the chromatographic column.
    • 本发明涉及一种改进的双光束多通道分光光度计,其采用与光电二极管阵列组合的简单且新颖的光学系统以及将光信号转换成吸光度的唯一的对数数据转换器。 特别地,光学系统利用新颖的布置中的光学元件来分别通过样品和参考单元引导基本上平行的一对等效样品和参考光束,并将出射样品和参考光束聚焦并引导到单个平面 将每个样本和参考光束分别分散在一对垂直设置的光电二极管阵列上的水平格栅光栅,由此光信号通过独特的对数数据转换器转换成吸光度单位(AU)。 分光光度计是高精度的,具有非常低的漂移,小于2×10 -4 AU /℃,噪音非常低,小于+/- 2×10 <5> AU。 双光束多通道分光光度计特别适用于高压液相色谱,以记录样品从色谱柱中洗脱的吸收光谱。