Abstract: The invention relates to an apparatus (200) for checking an adjustment state of an image sensor (120) of a camera module (115), the apparatus (200) having the following features: a first optical device (205) having a first optical element (220) which can be illuminated by a first light source (210) and can be moved along a first optical axis (215); a second optical device (235) having a second optical element (250) which can be illuminated by a second light source (240) and can be moved along a second optical axis (245), the second optical device (235) being positioned at a distance from the first optical device (205) and the first optical axis having a point of intersection (260) with the second optical axis (245), it being possible to position the camera module (115) to be checked in a region of the point of intersection (260); and an evaluation device (270), which is designed to read in position information (275) that represents a position, detected at a specific time, of the first and second optical el

Abstract: The invention relates to a method for determining a refractive index of an optical test object (100), which has a first surface (102) and a second surface (104) arranged at a wedge angle (?) to the first surface (102), the method comprising the following steps: detecting a first reflection light beam (401), a second reflection light beam (402) and a third reflection light beam (413), wherein the first reflection light beam (401) represents a light beam reflected at the first surface (102) and wherein the second reflection light beam (402) represents a light beam reflected at the second surface (104) and wherein the third reflection light beam (413) represents a light beam reflected at a mirror element (420), determining a first angle (a) between the first reflection light beam (401) and the second reflection light beam (402) and determining a second angle (?) with the aid of the third reflection light beam (413), and calculating (315) the refractive index (n) using the first angle (a) and the second angle (?)

Abstract: A device for measuring imaging properties of an optical system including: a rigid holding device; and MTF measuring devices arranged at predefined positions of the holding device such that, by each of the MTF measuring devices, a modulation transfer function can be measured at respective different, predefinable, angular positions in the image field of the optical system; wherein the holding device includes at least a first holder and a second holder; the MTF measuring devices include a first group and a second group; the first holder holds the first group at first positions so that the first group are arranged on a first spherical shell; the second holder holds the second group at second positions so that the second group are arranged on a second spherical shell; and the first spherical shell and the second spherical shell have different radii and are arranged so as to be mutually concentric.

Abstract: An apparatus for measuring the MTF or another optical property of an optical system includes an object to be imaged, which has a plurality of structures arranged in a plane and separated from one another, a two-dimensional image sensor, and collecting optics having a focal length f. The image sensor has a distance a from the collecting optics with 0.94·f?a?1.1·f. A holder for the optical system is arranged such that the optical system is located in a beam path between the object and the collecting optics. The image sensor and the collecting optics are configured such that all structures can be imaged by the optical system and the collecting optics onto the image sensor simultaneously.

Abstract: A measuring apparatus for measuring a modulation transfer function (MTF) of an afocal optical system has a receiving device, a light-providing device, a camera, at least one further light-providing device, at least one further camera, and a transmission interface. In an operational state, the light-providing device, the afocal optical system, and the camera are arranged coaxially on or with measurement axes parallel to a measuring axis oriented perpendicularly to the receiving plane. The further light-providing device, the afocal optical system, and the further camera are arranged coaxially on or with measurement axes parallel to an oblique measuring axis oriented obliquely to the measuring axis. An evaluation unit is configured to identify, using at least one camera image, the modulation transfer function of the afocal optical system.

Abstract: An optical testing device having a light source to emit a light beam and a beam shaper with a diffractive optical element to shape the light beam and direct it onto a coupling-in area of an optical workpiece to coupling the shaped light into the optical workpiece to be inspected. The optical testing device also has a workpiece holder to hold the optical workpiece and has a detector to evaluate light emerging from the coupling-out area of the optical workpiece in order to inspect an optical property of the workpiece.

Abstract: An apparatus for testing an astigmatic optical test object is provided. The apparatus comprises an illumination device having a light source, a ring-shaped mask element and a collimation optical unit. The collimation optical unit is formed to emit to the test object light beams of the ring-shaped mask element illuminated by the light source in the form of collimated test light. The apparatus also comprises an evaluation device, which is configured to record and evaluate an image generated by the test object in response to the test light in order to determine an axis position of the test object and an optical parameter related to the axis position.

Abstract: A method for determining an imaging quality of an optical system to be tested is presented. The method comprises a step of capturing an optical wavefront profile in a measurement plane behind an exit pupil of the optical system, a step of ascertaining a partial optical wavefront profile for each subaperture of a plurality of subapertures of the measurement plane using the wavefront profile, and a step of determining a partial optical imaging quality for each of the subapertures using the ascertained partial optical wavefront profiles.

Abstract: A holding device for holding an optical element for the testing thereof comprises a hollow base body, a stationary ring and a movable ring. The stationary ring is arranged on or fastened to the base body, wherein the stationary ring has, at one axial end, a contact face for bearing against the optical element. The movable ring is mounted axially displaceably on the base body relative to the stationary ring and the base body, wherein the movable ring has, at one axial end, a contact face for bearing against the optical element. The stationary ring and the movable ring are arranged coaxially with respect to one another, wherein a gap is arranged at least between the stationary ring and the movable ring, in which gap a vacuum for holding the optical element can be generated.

Abstract: A testing device for testing an optical sample that comprises a radiation source for emitting a plurality of optical beams along an optical axis. In addition, the testing device comprises an optical element designed as a filter element for imprinting a specific polarization-direction onto the plurality of optical beams or filtering light reflected or transmitted by the optical sample. The testing device also comprises a rotation unit designed for rotating the optical sample lying on the optical axis by a rotation angle relatively to the filter element. The testing device also comprises a detection unit for determining a polarization axis of the optical sample from the rotation angle and a reflected light beam, from the plurality of optical beams, reflected by the optical sample or transmitted through the optical sample, as well as a measure for the decentration value of the optical sample.

Abstract: A device for imaging through an optical system to be tested. The device comprises a first device section with a first degree of transmission for electromagnetic waves and a second device section with a second degree of transmission for the electromagnetic waves, wherein the second degree of transmission is greater than the first degree of transmission. At least one of the device sections has an annular shape.

Abstract: A measuring apparatus for measuring a modulation transfer function (MTF) of an afocal optical system has a receiving device, a light-providing device, a camera, at least one further light-providing device, at least one further camera, and a transmission interface. In an operational state, the light-providing device, the afocal optical system, and the camera are arranged coaxially on or with measurement axes parallel to a measuring axis oriented perpendicularly to the receiving plane. The further light-providing device, the afocal optical system, and the further camera are arranged coaxially on or with measurement axes parallel to an oblique measuring axis oriented obliquely to the measuring axis. An evaluation unit is configured to identify, using at least one camera image, the modulation transfer function of the afocal optical system.

Abstract: An MTF testing apparatus including a plurality of telescopic cameras each mounted at a fixed predetermined position on a camera holder, each camera receiving an image projected by at least one lens of a single device under test. A processor is coupled to the telescopic cameras. is the processor configured to receive image data from every telescopic camera and perform a plurality of MTF measurements, the telescopic cameras are mounted on the camera holder such that every telescopic camera captures image data resulting in an MTF measurement at a different field position of the lens. The camera holder comprises a holding structure and at least two brackets elongated elements projecting between first and second end portions, the end portions being releasably mounted on the holding structure, and at least two cameras are mounted on every bracket and the brackets are individually detachable from the holding structure.

Abstract: A device for measuring imaging properties of an optical system including: a rigid holding device; and MTF measuring devices arranged at predefined positions of the holding device such that, by each of the MTF measuring devices, a modulation transfer function can be measured at respective different, predefinable, angular positions in the image field of the optical system; wherein the holding device includes at least a first holder and a second holder; the MTF measuring devices include a first group and a second group; the first holder holds the first group at first positions so that the first group are arranged on a first spherical shell; the second holder holds the second group at second positions so that the second group are arranged on a second spherical shell; and the first spherical shell and the second spherical shell have different radii and are arranged so as to be mutually concentric.

Abstract: The invention relates to an apparatus (2) for detecting imaging quality of an optical system (4) with at least one lens (6) or lens group. The apparatus (2) includes an MTF measuring apparatus (10) for measuring a modulation transfer function at a plurality of field points in the field of view of the optical system (4), and a centering measuring apparatus (18) for measuring a centered state of the optical system (4).

Abstract: An MTF testing apparatus including a plurality of telescopic cameras each mounted at a fixed predetermined position on a camera holder, each camera receiving an image projected by at least one lens of a single device under test. A processor is coupled to the telescopic cameras. is the processor configured to receive image data from every telescopic camera and perform a plurality of MTF measurements, the telescopic cameras are mounted on the camera holder such that every telescopic camera captures image data resulting in an MTF measurement at a different field position of the lens. The camera holder comprises a holding structure and at least two brackets elongated elements projecting between first and second end portions, the end portions being releasably mounted on the holding structure, and at least two cameras are mounted on every bracket and the brackets are individually detachable from the holding structure.

Abstract: The invention relates to an apparatus (2) for detecting imaging quality of an optical system (4) with at least one lens (6) or lens group. The apparatus (2) includes an MTF measuring apparatus (10) for measuring a modulation transfer function at a plurality of field points in the field of view of the optical system (4), and a centering measuring apparatus (18) for measuring a centered state of the optical system (4). Furthermore, the invention relates to a method for detecting imaging quality of an optical system (4) having such a apparatus (2).

Abstract: A device for measuring the MTF or another imaging property of an optical system has a light pattern generating unit that generates a light pattern in a focal plane of the optical system. A reference axis of the device is oriented along an optical axis of the optical system. The device further comprises an arrangement of N, N=2, 3, 4, . . . , cameras that are separated from one another. Each camera has an objective and a light sensor that is arranged in a focal plane of the objective. The cameras are arranged on a side opposite the light pattern generating unit such that the light sensor of each camera detects an image of exactly one section of the light pattern. At least one beam deflecting element is arranged between the optical system and at least one of the cameras such that it deflects light away from the reference axis before the light impinges on the at least one camera.

Abstract: The invention relates to a system for determining the position of a test object comprising the following features: an autocollimation telescope having a beam source for emitting a beam; a beam splitter; a detector unit and an objective lens; and an optical element embodied as a focusing device, wherein the test object, the beam source and the focusing device are arranged along a common optical axis (z), and a control device for controlling the focusing device, which is designed in such a way that the beam can be focused onto a center of curvature of a first test surface of the test object with the coordinates (x1, y1) and at least onto a center of curvature of a second test surface of the test object with coordinates (x2, y2).

Abstract: An apparatus (10) and method for adjusting and/or calibrating a multi-camera module (2) having a plurality of cameras (4a, 4b). The apparatus (10) includes an optical arrangement for creating first virtual test structures (22) at an infinite distance and second test structures (26, 32) at a finite distance. Individual images (20a, 20b) captured with the cameras (4a, 4b) of the multi-camera module (2) include respectively the first and the second test structure (22, 26, 32). Based on the deviation of the position of the test structures (22, 26, 32) in the two individual images (20a, 20b), the cameras (4a, 4b) of the multi-camera module (2) are aligned relative to each other.