| 摘要 |
1,213,952. 952. Optical apparatus. SOLA INTERNATIONAL PTY. Ltd. May 12, 1969 [May 16, 1968], No.24101/69. Heading G2J. [Also in Division F4] An illuminating head piece for use particularly by dental and ophthalmic surgeons comprises a spectacle frame 10 whose glasses 11 are apertured to carry a pair of secondary lens magnifying systems 12 extending therethrough and which supports a lamp housing 19 containing a lamp which may be prefocused. As shown each lens system 12 consists of a single element having a toroidal or spherical inner surface and an aspherical outer surface 18 and the housing 19 is pivotable on pins 22 and contains a single aspherical condensing lens (not shown) and an infrared filter 27.
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