基本信息

• 发明名称： 【发明专利】 Improvements in or relating to internal reflection devices
• 申请日： 1970-08-16
• 申请号/专利号： GB2186665
• 专利权人： BEALE JULIAN ROBERT ANTHONY;BERZ FEODORA
• 申请人： MULLARD LTD
• 分类号：
• 发明人/设计人： BEALE JULIAN ROBERT ANTHONY;BERZ FEODORA
• 公开日/公告日： 1970.08.17
• 优先权号：
• 代理机构：
• 代理人：
• PCT申请号： 无
• PCT申请日期： 无
• PCT进入国家阶段日： 无
• 生物宝藏信息： 无
• 审查员： 无

摘要：1,101,037. Optical apparatus. MULLARD Ltd. March 31, 1966 [May 24, 1965], No. 21866/65. Heading G2J. An optical element 2, Fig. 2, of refractive index n 1 , particularly for use in attenuated total reflection (A. T. R.) spectroscopy, is provided with a thin layer 6 of refractive index n 3 and thickness d with an outer face 7 adjacent a medium 8 of refractive index n 2 where n 2 < n 3 and n 2 < n 1 , the arrangement being such that when a beam 1 of radiation of free-space wavelength # is directed from a source 9 into the element 2, the layer 6 produces a standing wave of light of great intensity. The material to be investigated by A. T. R. may form the layer 6, the medium 8, or be provided in the medium 8 as a thin film on surface 7. The element 2 may be of silicon (n = 3À5) or germanium (n 1 = 4) and layer 6 of silica (n 3 = 1À45). As shown the beam is incident on the interface 5 at an angle e 1 where n 3 > n 1 sin # 1 > n 2 and refracted into the layer 6 with an angle of refraction # 2 where:- where k is an arbitrary integer equal to 0, 1, 2, ..... (# r ) 6 7 is the phase change on reflection in the layer 6 at the surface 7 and (# r ) 2 5 is that in the element 2 at the interface 5, the source 9 being such that the beam is coherent over a length l in the plane of incidence on the interface 5 where r 1 being the reflection coefficient for immediate reflection of the radiation travelling in the element 2 at the interface 5 so that in operation the electric field vector of the radiation at the face 7 is greater than it would have been if face 7 coincided with interface 5 except insofar as the vector at face 7 is reduced by absorbent material, if any, present within layer 6.

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