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    • 2. 发明授权
    • Tunable Fabry-Perot filter
    • 可调式法布里 - 珀罗滤镜
    • US4553816A
    • 1985-11-19
    • US467619
    • 1983-02-17
    • William W. DurandAnil K. JainRonald E. Peterson
    • William W. DurandAnil K. JainRonald E. Peterson
    • G01J3/26G02B5/28
    • G02B5/284G01J3/26
    • A tunable Fabry-Perot filter device including at least three low index substrates having a refractive index less than 2.4 and mounted in parallel relationship so as to present two pairs of facing sides to each other in an optical path and a high index, non-metallic or non-absorbing coating having a refractive index of at least 4.0, the high index coating being placed on the facing sides of each of said low index substrates with the thickness of the coating on at least one of the pairs of facing sides being less than the thickness of the coating on the other of the pairs of facing sides, and spacer means for mounting said low index substrates and adjusting the distance between said facing sides. Preferred substrates are potassium halides, cesium halides, and zinc selenide. High index, non-metallic or non-absorbing coatings are preferably from the group of lead telluride, bismuth telluride, germanium telluride and germanium. A high index coating normally has an optical thickness less than or equal to one-half of the minimum wavelength of light to be transmitted through the device. In a preferred embodiment, the spacer means is adapted to adjust one of said pairs of faces to pass the desired wavelength and the other of said pairs of faces is adjusted to pass a wide band width less than the separation between the multiple anharmonic bands. In another preferred embodiment, the spacer means is adapted to adjust one of said pairs to transmit a desired wavelength and the other of said pairs of faces is adjusted to transmit one of the multiple anharmonic bands at the desired wavelength such that only the desired wavelength is precisely tuned at said pairs.
    • 一种可调谐的法布里 - 珀罗过滤装置,其包括折射率小于2.4的至少三个低折射率衬底,并且以平行关系安装,以便在光路和高折射率非金属材料中呈现两对相对的侧面 或非吸收性涂层,其折射率为至少4.0,高折射率涂层被放置在每个所述低折射率基底的相对侧上,其中至少一对面对侧的涂层的厚度小于 在一对面对侧的另一个上的涂层的厚度,以及用于安装所述低折射率基板并调节所述相对侧之间的距离的间隔装置。 优选的底物是卤化钾,卤化铯和硒化锌。 高折射率,非金属或非吸收性涂层优选来自碲化铅,碲化铋,碲化锗和锗。 高折射率涂层通常具有小于或等于要透过该器件的光的最小波长的一半的光学厚度。 在优选实施例中,间隔装置适于调节所述面对之一以通过所需波长,并且所述对面中的另一对被调节以通过小于多个非平行带之间的间隔的宽带宽。 在另一个优选实施例中,间隔装置适于调节所述对中的一个以发射期望的波长,并且调节所述面对中的另一个以将所述多个非谐波带之一以期望的波长传输,使得仅期望的波长为 精确调整在所述对。
    • 3. 发明授权
    • Graded index Fabry-Perot optical filter device
    • 分级指标法布里 - 珀罗滤光器
    • US4377324A
    • 1983-03-22
    • US175159
    • 1980-08-04
    • William W. DurandAnil K. JainRonald E. Peterson
    • William W. DurandAnil K. JainRonald E. Peterson
    • G02B5/28
    • G02B5/284G02B5/289
    • A Fabry-Perot filter device comprising a pair of low index substrates having a refractive index of less than 2.4 and mounted in parallel relationship so as to present facing sides to each other in an optical path. A coating is placed on the facing sides of each of said low index substrates, the coating having an increasing index of refraction away from the sides from about that of the substrate to above 4.0 such that the index increases in increments of from at least 2 steps to continuously. The total coating thickness is on the order of the light wavelength or more. Means are also provided to adjust the distance between the two faces, at least from a distance of from substantially less than a desired wavelength to at least one-half of the desired wavelength.
    • 一种法布里 - 珀罗过滤器装置,包括折射率小于2.4的一对低折射率衬底,并且以平行关系安装,以在光路中彼此面对。 将涂层放置在每个所述低折射率基材的相对侧上,所述涂层具有从所述基材的侧面到所述底部的折射率的增加的折射率,使得所述指数从至少2个步骤的增量增加 不断地 总涂层厚度在光波长或更大的数量级上。 还提供了用于调整两个面之间的距离的装置,至少从基本上小于所需波长的距离到至少所需波长的一半。