OPTICAL DEVICE FOR CONCENTRATING LIGHT FROM A LINEAR FIELD ON TO A RECEIVER

摘要

The present invention provides an apparatus for concentrating light from a linear field of to a relatively small receiver wherein said receiver is disposed at the end of a rod light guide on the peripheral surface of which light emanating from the linear field is directed, the improvement wherein the linear field is arranged substantially at the focal distance from a first concave strip mirror which is disposed so as to extend optically parallel to the field and reflects the incident light from said field to a second concave strip mirror which is optically parallel with the first mirror and forms therewith a substantially telecentric system and which, in turn, reflects the incident light to the peripheral surface of the rod light guide.