Spectroscopic instruments. V. Infrared spectrophotometer.

Portable visible and near-infrared spectrophotometer for triglyceride measurements.

An affordable and portable machine is required for the practical use of visible and near-infrared (Vis-NIR) spectroscopy. A portable fruit tester comprising a Vis-NIR spectrophotometer was modified for use in the transmittance mode and employed to quantify triglyceride levels in serum in combination with a chemometric analysis. Transmittance spectra collected in the 600- to 1100-nm region were ...

Design for the COBE1 Far Infrared Absolute Spectrophotometer (FIRAS)

The Far InfraRed Absolute Spectrophotometer (FIRAS) was built to measure the spectrum of diiuse emission from 1 to 100 cm ?1 , with particular attention to possible diierences between the spectrum of the cosmic microwave background radiation (CMBR) and a blackbody spectrum as small as 0.1% of the peak of the CMBR spectrum. The FIRAS has diierential inputs and outputs, a full beam external calib...

Analysis Using Infrared Spectroscopic Methods

High-definition infrared spectroscopic imaging.

The quality of images from an infrared (IR) microscope has traditionally been limited by considerations of throughput and signal-to-noise ratio (SNR). An understanding of the achievable quality as a function of instrument parameters, from first principals is needed for improved instrument design. Here, we first present a model for light propagation through an IR spectroscopic imaging system ba...

Cold Chopper System for Mid-infrared Instruments

We have developed a cold chopper system for mid-infrared observations. This system is installed into the newly developing mid-infrared instrument, MAX38, for the University of Tokyo Atacama 1.0-m telescope. It is cooled to about 9K. The cold chopper mirror is controlled by a piezoelectric actuator with a flexure hinge lever, and enables square-wave chopping at a frequency up to 7.8 Hz. At the m...