Includes: 1¼” telescope coupler, 1.0mm infrared InGaAs cooled photodiode detector, 5 VDC power supply (stock #17065) and Install CD with SSP4Dataq. Order 2-position filter slider, J-H filters and serial cable separately. See page 3 for filter selection. This instrument is not available in automatic slider version. Advise Optec of the telescope type to be used with the SSP-4. The focus in the infrared may be different from the visual focus requiring an adjustment of the focusing eyepiece to compensate for this difference. Purchasers of the SSP-4 must indicate the telescope make and type when ordering.
After nearly 20 years and several attempts, Optec has developed a new Near-IR photometer for medium to large size telescopes. Relatively new InGaAs PIN photodiodes designed for the fiber optics communication market have reached very high performance levels compared to the IR detectors of earlier times. It is now possible to design and build an IR photometer, which allows a great many stars to be observed accurately in the J (1250nm) and H (1650nm) photometric bands. Using custom J-band and H-band filters the SSP-4 allows amateur astronomers with 10-inch and larger telescopes to perform a level of scientific measurement unheard of just a few years ago.