公开(公告)号：WO1993001510A1

公开(公告)日：1993-01-21

申请号：PCT/US1992005569

申请日：1992-07-01

Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM

Inventor： BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM ,  MAGNUSSON, Robert ,  WANG, Shu-Shaw

IPC: G02B05/26

CPC classification number: H01S3/106 ,  G02B5/1828 ,  G02B5/203 ,  G02F1/01 ,  G02F1/0338 ,  G02F2201/302 ,  G02F2203/055 ,  H01S3/1055 ,  H01S3/107 ,  H01S5/028 ,  H01S5/125 ,  H01S5/141

Abstract: A guided-mode resonance filter is provided which can be used as an optical filter with very narrow line width and as an efficient optical switch. Diffraction efficiencies and passband frequencies are calculated based on guided-mode resonance properties of periodic dielectric structures in a waveguide geometry. The guided-mode resonance filter preferably includes means for changing various parameters within the grating (10) so as to change passband frequencies in response thereto. Also, the present invention envisions a narrowband tuneable laser having a diffraction grating of the present invention placed within a laser cavity to provide narrowband optical wave output from the narrowband tuneable laser. In another preferred embodiment, the present diffraction grating can be supported by a semiconductor substrate, preferably adjacent to a semiconductor laser for fine-tuning the output of the semiconductor laser. In still another preferred embodiment, the present diffraction grating can be placed between thin-film layers to enhance thin-film performance characteristics.

公开(公告)号：WO1992008152A1

公开(公告)日：1992-05-14

申请号：PCT/EP1991001914

申请日：1991-10-08

Applicant: BASF LACKE + FARBEN AKTIENGESELLSCHAFT ,  HENNING, Rainer ,  SANDMANN, Franz-Josef ,  FISTER, Friedrich

Inventor： BASF LACKE + FARBEN AKTIENGESELLSCHAFT

IPC: G02B05/26

CPC classification number: G02B5/208

Abstract: The invention concerns a method of reducing the increase in temperature which is produced by sunshine entering an enclosed space by the window, the method being characterized by the fact that at least part of the surface of the inside walls of the space and/or at least part of the surface of the objects present in the space have an IR-reflective coating.

公开(公告)号：WO1990002964A1

公开(公告)日：1990-03-22

申请号：PCT/US1989003761

申请日：1989-09-05

Applicant: UNITED STATES DEPARTMENT OF ENERGY ,  EMMETT, John, L. ,  ETZKORN, Heinz-Werner ,  JESCHKOWSKI, Ulrich ,  KERSTEN, Ralf, Th. ,  PAQUET, Volker

Inventor： UNITED STATES DEPARTMENT OF ENERGY

IPC: G02B05/26

CPC classification number: G02B5/285 ,  G02B5/0833 ,  G02B5/0883 ,  G02B5/289

Abstract: A highly damage resistant, multilayer, optical reflective coating (20) includes alternating layers (24, 26) of doped and undoped dielectric material. The doping levels are low enough that there are no distinct interfaces between the doped and undoped layers so that the coating has properties nearly identical to the undoped material. The coating is fabricated at high temperature with plasma-assisted chemical vapor deposition techniques to eliminate defects, reduce energy-absorption sites, and maintain proper chemical stoichiometry. A number of differently-doped layer pairs, each layer having a thickness equal to one-quarter of a predetermined wavelength in the material are combined to form a narrowband reflective coating (20) for a predetermined wavelength. Broadband reflectors (55) are made by using a number of narrowband reflectors, each covering a portion of the broadband.

Abstract translation: 高度耐损伤的多层光反射涂层（20）包括掺杂和未掺杂的介电材料的交替层（24,26）。 掺杂水平足够低，使得掺杂层和未掺杂层之间没有明显的界面，使得涂层具有与未掺杂材料几乎相同的性质。 涂层采用等离子辅助化学气相沉积技术在高温下制造，以消除缺陷，减少能量吸收部位，保持适当的化学计量。 多个不同掺杂层对，每层具有等于材料中预定波长四分之一的厚度，以形成预定波长的窄带反射涂层（20）。 宽带反射器（55）通过使用多个窄带反射器制成，每个窄带反射器覆盖宽带的一部分。