Part of the 640-element PDA.
Block diagram of PDA: (A) 320-element charge amplifier array, (B) sample hold circuit, (C) shift register circuit, and (D) timing generator circuit. Two ROICs and one PDA are assembled by the wire bonding method.
Outline view of photodiode array sensor.
Plot of root mean square noise current of each pixel.
Fiber interface model of P-NIRs equipped with diffuse reflectance probe.
Direct interface model of P-NIRs. (A) Optical window through which the irradiating and the diffuse reflected light are transmitted.
Spectroscopic analyzer configuration: (A) spectroscope with a PDA detector, (B) internal optical source, (C) 18-bit analog/digital convertor for signal conversion and CPU, (D) data interface, (E) power supply (battery and external source), and (F) optical fiber probe.
Spectro-engine of P-NIRs: (A) collimator lens, (B) diffraction grating, (C) focusing lens, (D) mirror, and (E) 640-element PDA.
Blending test setup.
Second-derivative spectra of talc with different wavelength resolutions.
DR-NIR spectra of the D-mannitol and talc during mixing.
Second-derivative spectra of the D-mannitol and talc during mixing.
Plots for standard deviation of the second-derivative absorbance at 1392, 1495, and 1580 nm versus time.
Specification of P-NIRs.
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