LASER POWER ADJUSTMENT DURING TUNING TO COMPENSATE FOR DETECTOR RESPONSE AND VARYING BACKGROUND ABSORBPTION

    公开(公告)号:US20190131769A1

    公开(公告)日:2019-05-02

    申请号:US16160822

    申请日:2018-10-15

    Abstract: An assembly (14) for analyzing a sample (15) includes a detector assembly (18); a tunable laser assembly (10); and (iii) a laser controller (10F). The detector assembly (18) has a linear response range (232) with an upper bound (232A) and a lower bound (232B). The tunable laser assembly (10) is tunable over a tunable range, and includes a gain medium (10B) that generates an illumination beam (12) that is directed at the detector assembly (18). The laser controller (10F) dynamically adjusts a laser drive to the gain medium (10B) so that the illumination beam (12) has a substantially constant optical power at the detector assembly (18) while the tunable laser assembly (10) is tuned over at least a portion of the tunable range.

    LOW-NOISE SPECTROSCOPIC IMAGING SYSTEM WITH STEERABLE SUBSTANTIALLY COHERENT ILLUMINATION

    公开(公告)号:US20220091403A1

    公开(公告)日:2022-03-24

    申请号:US17543372

    申请日:2021-12-06

    Abstract: A spectral imaging device (1312) for capturing one or more, two-dimensional, spectral images (1313A) of a sample (1310) including (i) an image sensor (1328), (ii) an illumination source (1314), (iii) a beam path adjuster (1362), and (iv) a control system (1330). The illumination source (1314) that generates an illumination beam (1316) that is directed along an incident sample beam path (1360) at the sample (1310). The beam path adjuster (1362) selectively adjusts the incident sample beam path (1360). The control system (1330) controls (i) the illumination source (1314) to generate the illumination beam during the first capture time, (ii) the image sensor (1328) during the first capture time to capture first information for the first spectral image (1313A), and (iii) the beam path adjuster (1362) to selectively adjust the incident sample beam path (1360) relative to the sample (1310) during the first capture time while the image sensor (1328) is accumulating the information for the first spectral image (1313A).

    PHYSIOLOGICAL PARAMETER ANALYSIS ASSEMBLY
    3.
    发明申请
    PHYSIOLOGICAL PARAMETER ANALYSIS ASSEMBLY 审中-公开
    生理参数分析总结

    公开(公告)号:US20150330893A1

    公开(公告)日:2015-11-19

    申请号:US14716374

    申请日:2015-05-19

    Abstract: An analysis assembly (12) for analyzing one or more physiological parameters of a person (10) comprises a sensor assembly (14) and an analyzer (16). The sensor assembly (14) includes a sampler (218) that collects a sample (220) from the person (10); and a signal generating apparatus (222) that directs a mid-infrared light beam (232) toward the sample (220) and performs spectroscopy on the sample (220) to generate a signal (215) that is based at least in part on the one or more physiological parameters of the person (10). The sampler (218) and the signal generating apparatus (222) can be positioned less than approximately one meter from the person (10) while the sample (220) is being collected and spectroscopically scanned to generate the signal (215). The analyzer (16) receives and analyzes the signal (215) to determine the presence of the one or more physiological parameters in the sample (220).

    Abstract translation: 用于分析人(10)的一个或多个生理参数的分析组件(12)包括传感器组件(14)和分析器(16)。 传感器组件(14)包括从人(10)收集样品(220)的取样器(218)。 以及信号发生装置(222),其将中红外光束(232)引向样品(220)并对样品(220)进行光谱学以产生信号(215),该信号至少部分地基于 人(10)的一个或多个生理参数。 采样器(218)和信号发生装置(222)可以定位在距离人(10)小于约一米处,同时采集样品(220)并进行光谱扫描以产生信号(215)。 分析器(16)接收并分析信号(215)以确定样品(220)中的一个或多个生理参数的存在。

    Low-noise spectroscopic imaging system

    公开(公告)号:US10365158B2

    公开(公告)日:2019-07-30

    申请号:US15997452

    申请日:2018-06-04

    Abstract: A spectral imaging device (12) includes an image sensor (28), an illumination source (14), a refractive, optical element (24A), a mover assembly (24C) (29), and a control system (30). The image sensor (28) acquires data to construct a two-dimensional spectral image (13A) during a data acquisition time (346). The illumination source (14) generates an illumination beam (16) that illuminates the sample (10) to create a modified beam (16I) that follows a beam path (16B) from the sample (10) to the image sensor (28). During the data acquisition time (346), the control system (30) controls the illumination source (14) to generate the illumination beam (16), and controls the image sensor (28) to capture the data. Further, during the data acquisition time (346), an effective optical path segment (45) of the beam path (16B) is modulated.

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