Received 1/16/2004; revised 2/27/2004; accepted 3/5/2004. For correspondence and reprints contact: Ping-I Hsu, M.D., Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung 813, Taiwan, ROC. Tel: (886)73422121 ext. 2075, Fax: (886)7-3461179, E-mail: [email protected] Background: Infrared spectrometer has been de...

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A fibre coupled near-infrared superluminescent light emitting diode that emits approximately 10 mW of radiation between 1.62 and 1.7 microm is employed in combination with a broad-band cavity enhanced spectrometer consisting of a linear optical cavity with mirrors of reflectivity approximately 99.98% and either a dispersive near-infrared spectrometer or a Fourier transform interferometer. Resul...

We present the design and performance of TANSPEC, a medium-resolution $0.55-2.5~\mu$m cryogenic spectrometer imager, now in operation at 3.6-m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides three modes which include, photometry with broad- narrow-band filters, spectroscopy short slits 20$^{\prime \prime}$ length different widths (from 0.5$^{\prime to 4.0$^{\prime \prim...

We have designed and constructed a custom far-infrared Fourier transform spectrometer using an antenna-coupled bolometer as a detector. The active element of the detector is a superconducting niobium microbridge, and the far-infrared signal is coupled to the microbridge via a planar antenna mounted on a hyperhemispherical silicon lens. The spectrometer uses a broadband blackbody source with fre...