Abstract:
The invention relates to a method for identifying optical aberrations, comprising the steps of providing at least one first optical beam (B1) and a second optical beam (B2), wherein the intensity of one of the optical beams (B1) is higher than the intensity of the other optical beam (B2); creating a combined beam (CB) by at least partially superimposing the first and the second optical beam (B1, B2); focusing the combined beam (CB) into or through a medium (S) and detecting radiation excited in the medium (S) by the combined beam (CB) due to nonlinear optical effects; wherein the first beam (B1) is shifted in phase relative to the second beam (B2) to a plurality of phase positions, the first beam (B1) is spatially displaced relative to the second beam (B2) to a plurality of spatial positions and/or temporally shifted relative to the second beam (B2) to a plurality of time positions; detecting the radiation excited in the medium by the combined beam (CB) for each one of the phase positions, the spatial positions and/or the time positions of the first beam (B1), wherein the radiation is detected by means of a detection device (140); and identifying aberrations using signals generated by the detection device (140) for the plurality of the phase positions, the spatial positions and/or the time positions of the first beam relative to the second beam (B2) upon the detection of the radiation excited in the medium (S). The invention also is related to an arrangement for identifying optical aberrations.
Abstract:
The present invention concerns an optical system for shaping the wavefront of the electric field of an input light beam (1) to be projected into a target volume (5), including: - a first optical element (2), which is a spatial light modulator used to control light distribution in at least one transverse plane (51, 52, 53) in the target volume (5), - at least one intermediate optical element (4) being located, on an optical axis (z), after the first optical element (2) on a trajectory of the light beam (1) for modulating the phase and/or the amplitude of the electric field of the input light beam, and - a second optical element (3) for modulating the phase and/or the amplitude of the electric field of the input light beam,and used to control the axial position of the at least one transverse plane (51, 52, 53) in the target volume (5), the second optical element (3) being situated on the optical axis (z) after the at least one intermediate optical element (4) on the trajectory of the light beam (1).
Abstract:
Diffractive optical element (6) of the holographic type, which diffractively generates, when illuminated by a predetermined first electromagnetic field (DOB) having non-zero orbital angular momentum, a second electromagnetic field (IOB) forming a first image substantially lacking noise, indicative of information encoded by the diffractive optical element (6). In addition, the diffractive optical element (6) diffractively generates, when illuminated by a third electromagnetic field, a fourth electromagnetic field forming a noisy image. The first and the third electromagnetic field having different topological charges and/or different spatial distributions of phase singularities.
Abstract:
본 출원은, 광변조 장치 및 광변조 장치의 용도에 대한 것이다. 본 출원의 광변조 장치는 가시광선 영역에서 높은 투과율을 가지고 적외선 영역에서 낮은 투과율을 가지며 낮은 면저항 값을 가지는 복합층에 의하여 외부 신호를 인가할 수 있다. 이러한 광변조 장치는 스마트 윈도우, 윈도우 보호막, 플렉서블 디스플레이 소자, 3D 영상 표시용 액티브 리타더(active retarder) 또는 시야각 조절 필름 등과 같은 다양한 용도에 적용될 수 있다.
Abstract:
The present invention refers to a deformable lens structure for adaptive optics devices. The lens structure comprises a first layer (2) deformable and transparent to a light beam (L), a second layer (3) deformable and transparent to a light beam and a shaped spacer element (4), positioned between the inner surfaces of said first and second layer. The lens structure also comprises an inner chamber (5) having walls defined by said spacer element (4) and by said first and second layer (2-3). A liquid (6) transparent to said light beam (L) is present in said inner chamber in contact with said first and second layer. The lens structure also comprises first and second actuators integrally connected to said first and second layer, respectively.