A lamp projecting a high-intensity optical beam of spectral radiation, with an IR-extracting (cooling) array including an IR-dissipating "black-box" arranged to receive IR and convert it to box-heat, plus an IR-diverting "hot-mirror" interposed along the beam to divert (only) the IR to this "black-box".
This is a division of application Ser. No. 08/151,626, filed Nov. 15, 1993, now U.S. Pat. No. 5,426,530, which is a division of application Ser. No. 07/932,523, filed Aug. 20, 1992, now U.S. Pat. No. 5,264,961, which, in turn, is a division of 07/419,560, filed Oct. 10, 1989, now U.S. Pat. No. 5,146,362.
Viewing apparatus, for medical and surgical practitioners incorporating one or more optical filters, each exhibiting a reverse photopic response, such that green light is at least partially attenuated, whereas red and blue light are both substantially transmitted. The invention includes means for supporting one or more optical filters in the practitioner's field of view, such as a pair of eyeglass frames or endoscope mounting for use, for example, in conjunction with laparoscopic surgery. Various technologies may be employed to realize a desired reverse photopic response, including absorptive dyes, dielectric layers, and/or holograms.
