Opaque projector

An episcope which was used in a University of Cambridge lecture hall in the late 1800s

The opaque projector, epidioscope, epidiascope or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. A system of mirrors, prisms and/or imaging lenses is used to focus an image of the material onto a viewing screen. Because they must project the reflected light, opaque projectors require brighter bulbs and larger lenses than overhead projectors. Care must be taken that the materials are not damaged by the heat generated by the light source. Opaque projectors are not as common as the overhead projector.

单词	Opaque projector
释义	Opaque projector 英语百科 Opaque projector The opaque projector, epidioscope, epidiascope or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. A system of mirrors, prisms and/or imaging lenses is used to focus an image of the material onto a viewing screen. Because they must project the reflected light, opaque projectors require brighter bulbs and larger lenses than overhead projectors. Care must be taken that the materials are not damaged by the heat generated by the light source. Opaque projectors are not as common as the overhead projector.
随便看	serrated sickle的意思 serrated signal的意思 serrated spigot的意思 serrated spoon的意思 serrated surface的意思 serrated suture的意思 serrated teeth的意思 serrated topography的意思 serrated uterine depressor的意思 serrated vertical pulse的意思 serrated vertical sychronizing signal的意思 serrated vertical synchronizing signal的意思 serrated wheel的意思 serrated wheel hub的意思 serrated with pipe grip的意思 Serrated wrack的意思 serrated wracks的意思 Serrate Glorybower Herb的意思 Serrate Gtorybower Herb的意思 Serrate Hedge Prinsepia Nut的意思 serrate holly leaf的意思 serrate holly root的意思 Serrate Isodon Herb的意思 serrate jackinthepulpit rhizoma的意思 Serrate Jackinthepulpit Tuber的意思