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公开(公告)号：US5002380A
公开(公告)日：1991-03-26
申请号：US324502
申请日：1989-03-16
申请人： Robert Aprahamian
发明人： Robert Aprahamian
CPC分类号： G02B27/0025 , G02B17/061
摘要： Apparatus and a corresponding method, for removing the effect of phase aberrations introduced into an incident light wave by a large optical element, such as a large concave mirror. Rather than building additional precision into the mirror, phase correction is effected by first collimating and phase conjugating the incident beam after reflection from the mirror, then expanding the beam again to fill the mirror. After its second reflection from the large mirror, the light beam is practically free of phase errors, since the phase conjugated beam is subject to substantially the same phase aberrating conditions as the incident beam. The apparatus may be used to produce an aberration-free image of a distant object, or to produce an aberration-free collimated light beam from a diffraction-limited laser source.
摘要翻译： 用于消除由诸如大凹面镜的大型光学元件引入入射光波的相位差的影响的装置和相应的方法。 不是对镜子建立额外的精度，而是通过在从反射镜反射之后首先对入射光束进行准直和相位共轭，然后再次扩展光束以填充反射镜来实现相位校正。 在从大镜子的第二次反射之后，光束实际上没有相位误差，因为相位共轭光束受到与入射光束大致相同的相位差条件。 该装置可以用于产生远距离物体的无像差图像，或者从衍射受限激光源产生无像差的准直光束。
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公开(公告)号：US5886800A
公开(公告)日：1999-03-23
申请号：US47863
申请日：1993-04-15
申请人： Robert Aprahamian , George L. Clark , Lee O. Heflinger , Jesper Munch , Ralph Frederick Wuerker
发明人： Robert Aprahamian , George L. Clark , Lee O. Heflinger , Jesper Munch , Ralph Frederick Wuerker
CPC分类号： G02B26/06
摘要： A technique for correcting wavefront aberrations introduced by large primary optical elements in portions of the electromagnetic spectrum. The aberrations of the primary element are first transferred to a beacon beam and this aberrated beam is interfered with a reference beam in a holographic medium. These beams are then turned off and a beam from a distant object, containing the same aberrations, is allowed to diffract from the hologram. The diffracted beam from the hologram contains the image of the distant object with aberrations removed. Use of this technique permits the construction of large optical elements inexpensively, since surface tolerances of the elements can be substantially relaxed.
摘要翻译： 用于校正由电磁光谱的部分中的大的主要光学元件引入的波前像差的技术。 首要元件的像差首先转移到信标光束，并且该像差光束受到全息介质中的参考光束的干扰。 然后关闭这些光束，并且允许来自包含相同像差的远距离物体的光束从全息图衍射。 来自全息图的衍射光束包含去除了像差的远距离物体的图像。 使用这种技术允许廉价地构造大的光学元件，因为元件的表面公差可以基本上被放宽。
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公开(公告)号：US4794605A
公开(公告)日：1988-12-27
申请号：US839764
申请日：1986-03-13
CPC分类号： G02F1/3538 , H01S3/2383
摘要： A technique in which one or more phase conjugation cells, such as stimulated Brillouin scattering cells, are controlled by use of a seed beam injected into the cells. When a laser beam is focused into a phase conjugation cell, a reflected phase conjugated beam is produced. The seed beam is injected at the same frequency and in the same direction as the expected phase conjugated beam, and is adjusted to control the phase and other characteristics of the phase conjugated beam. In multiple cell arrays, seed beams are employed to ensure phase coherency of multiple beams. For lower energy applications, use of the seed beam allows a phase conjugation cell to be operated with incident beams of lower energy than would be needed without the seed beam.
摘要翻译： 通过使用注入细胞的种子束来控制一个或多个相位共轭细胞，例如受激布里渊散射细胞的技术。 当激光束聚焦到相位共轭单元中时，产生反射相共轭光束。 种子束以与预期相位共轭束相同的频率和相同的方向注入，并且被调整以控制相位共轭束的相位和其他特性。 在多个单元阵列中，使用种子束来确保多个波束的相位一致性。 对于较低能量应用，使用种子束允许相位共轭单元以比没有种子束所需要的能量更低的入射光束进行操作。
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公开(公告)号：US4794345A
公开(公告)日：1988-12-27
申请号：US832950
申请日：1986-02-26
申请人： Gary J. Linford , Robert Aprahamian , Leonard J. Marabella , Jesper Munch , Richard H. Moyer , Gabriel G. Lombardi
发明人： Gary J. Linford , Robert Aprahamian , Leonard J. Marabella , Jesper Munch , Richard H. Moyer , Gabriel G. Lombardi
CPC分类号： H01S3/2383 , G02F1/3538 , H01S3/08059
摘要： Apparatus, and a corresponding method for its use, for producing a phased array of high-energy laser beams from multiple laser amplifiers. A reference beam produced by a master oscillator senses phase and piston errors in a primary mirror array, and is divided into multiple probe beams, each of which makes multiple passes of its own laser amplifier. The multiple probe beams are together focused into a single phase conjugation cell, which not only produces phase-conjugated reflected beams, to effect compensation for various phase aberrations, but also locks all of the reflected beams together in phase. An arrangement of a birefringent wedge and a quaterwave plate for each of the beams prevents the reflected beams from returning to the master oscillator and facilitates combining of the reflected beams for output as a cophasal array. In a preferred embodiment of the invention, this is accomplished by using the birefringent wedges to deflect each retro-reflected phase-conjugated beam onto the appropriate portion of a monolithic secondary mirror, and then to the primary mirror array.
摘要翻译： 装置及其使用的相应方法，用于从多个激光放大器产生相位阵列的高能激光束。 由主振荡器产生的参考光束感测主反射镜阵列中的相位和活塞误差，并被分成多个探针光束，每个探头光束使其自身的激光放大器多次通过。 多个探头光束一起聚焦成单相共轭单元，其不仅产生相位共轭反射光束，以实现各种相位差的补偿，而且还将所有反射光束同相锁定在一起。 用于每个光束的双折射楔和四波形板的布置防止反射光束返回到主振荡器，并且促进反射光束的组合用作输出作为相位阵列。 在本发明的优选实施例中，这是通过使用双折射楔将每个反射相位共轭束偏转到单片次级反射镜的适当部分上，然后到主镜阵列来实现的。
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公开(公告)号：US4217558A
公开(公告)日：1980-08-12
申请号：US663404
申请日：1976-03-03
申请人： Robert Aprahamian , Joseph Miller
发明人： Robert Aprahamian , Joseph Miller
CPC分类号： H01S3/095 , H01S3/2383
摘要： A plurality of pulsed chemical lasers such as HF or DF lasers are disposed symmetrically about a central axis. Each laser is energized sequentially so that the resulting output laser pulses have substantially consecutive time duration. Hence, the duration of the laser pulses equals the duration of each laser times the number of lasers. Reflectors are provided for combining the output pulses of each laser to generate a segmented output beam.
摘要翻译： 诸如HF或DF激光器的多个脉冲化学激光器围绕中心轴对称设置。 每个激光器依次通电，使得所得到的输出激光脉冲具有基本上连续的持续时间。 因此，激光脉冲的持续时间等于每个激光器的持续时间乘以激光器的数量。 提供反射器用于组合每个激光器的输出脉冲以产生分段的输出光束。
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