what happened to the edmund scientific catalog?

Retrieved from "http://en.wikipedia.org/" All text is available under the terms of the GNU Free Documentation License

The multiple internal reflections also cause a polarization-dependent phase-lag of the transmitted light, in a manner similar to a Fresnel rhomb. This must be suppressed by special phase-correction coatings to avoid unwanted interference effects on the image.

Edmund Scientific catalog

A Schmidt-Pechan prism is a type of optical prism used to rotate an image by 180°. They are commonly used in binoculars as an image erecting system.

Analytical Instruments / Chemistry lab apparatus chromatographs, calorimeters, evaporators, fluorometers, hydrogenators, osmometers, polarimeters, spectrophotometers, titrators, meters for pH / conductivity / dissolved solids / ORP ... and much more... Biology / Microbiology laboratory apparatus bioreactors, cell disrupters, cell harvesters, cryostats, digesters, freeze-dryers / lyophilizers, growth chambers, homogenizers, hybridization, incubators, microscopes, osmometers, spiral platers, sterilizers ... and much more ... General Use laboratory apparatus balances, baths, blenders, centrifuges, chart recorders, freezers, fume hoods, furnaces, glassware washers, glove boxes, mixers, moisture testing, ovens, pumps, shakers, vacuum equipment, water purification ... and much more ... Medical / Clinical laboratory apparatus anaerobic incubators, autoclaves, blood testing, cell counters, CO2 incubators, cryostats, electrolyte analyzers, electrophoresis, glove boxes, microtomes, sterilizers, ... and much more ... Petroleum Products and Biofuel lab apparatus baths, calorimeters, color measurement, density meters, flash point, hydrogenators, oil testing, penetrometers, surface tension, vapor pressure, viscometers and rheometers, ... and much more ... Pharmaceutical laboratory apparatus stability chambers, tablet disintegration, tablet dissolution, tablet hardness, V-blenders, ... and much more ... Materials Testing / Physical Properties / Metallurgical lab apparatus abrasion, color measurement, environmental chambers, gloss / reflectance, hardness, impact testers, melt point, particle size, paint testers, penetrometers, sieve shakers, tensile strength, viscometers ... and much more ...

The prism consists of two glass prisms separated by an air-gap. Multiple total internal reflections of the light cause a vertical flipping of the image; a "roof" section of the second prism also flips the image laterally, together causing a 180° rotation of the image. The image's handedness is not changed.

Compared to the double-Porro prism or Abbe-Koenig designs, the Schmidt-Pechan is much more compact. However, the large number of reflections and glass/air transitions of the light make the prism more lossy than the other designs. Some of the surfaces must be optically coated for efficient internal reflection, since the light is incident at an angle less than the critical angle.