Methods and systems for measuring the asymmetrical image quality or image features of an intraocular lens (IOL), design, refractive and diffractive designs, such as IOLs with Extended tolerance of astigmatic effects are provided by through-focus and meridian response. Measurements are taken at various focal plane and meridian positions to allow for determination of areas of better performance away from 0 meridian or the start position and meridian.

A system for evaluating the modulation transfer function (MTF) of a device under test is provided. The system includes an image projector configured to provide light in a pattern representing a desired image. The system further includes a lens configured to direct the provided light toward the device under test as a collimated beam. An image analysis component calculates the MTF for the device under test from the at least one image taken at the device under test and the known characteristics of the image projector and the lens.

Provided is a micro-distance lens detection device adapted to detect a tested lens with a surface from a micro distance. The micro-distance lens detection device includes a light source module, a diffuser, a pattern test card, a collimator unit and an image pickup module which are arranged sequentially. The tested lens is disposed between the pattern test card and the collimator unit. The surface of the tested lens is separated from the light-emitting side of the pattern test card by the micro distance. The micro distance is less than 25 mm. Given the micro distance between the tested lens and the pattern test card, the optical resolution modulation transfer function (MTF) of the tested lens is correctly measured. Therefore, the lens detection device takes up little space.

For lens testing, a telecentric lens aims light from a light source on an exit pupil formed relative to a device lens of a device-under-test. A sensor receives light from the device-under-test.

A device and method that belongs to the field of Shack-Hartmann (S-H) wavefront detection, more specifically an adaption of the S-H sensor, with an attachment of customized focusing relay optics, onto opto-mechanical measurement instrument for the alignment and measurement of an optical systems with a higher numerical aperture (NA), where the object points are realized by an object plate from a suitable material with single mode fibers light sources polished to achieve the same plane as said object plate is disclosed.

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.Math.f?a?1.1.Math.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.

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.

A camera testing system for determining performance of a camera comprising an imaging sensor and a lens, the system comprising a processing system comprising at least one processor and memory. The processing system may be configured to: control the camera to capture, using the imaging sensor, a first image through the lens of a target disposed at a first distance from the camera; determine a first modulation transfer function (MTF) value from the first image; control the camera to capture, using the imaging sensor, a second image through the lens of the target disposed at a second distance from the camera that is different from the first distance; determine a second MTF value from the second image; and determine performance of the camera based on the first MTF value, the second MTF value and a difference between the first MTF value and the second MTF value.

A wavefront sensor includes a splitting element configured to split an incident light beam into a plurality of light beams, an image sensor configured to receive the plurality of light beams, and a processing unit configured to calculate a wavefront of the incident light beam based on an intensity distribution of the plurality of light beams received by the image sensor. The splitting element is either in direct contact with the image sensor or in contact with the image sensor via a plate glass. In the calculation of the wavefront, the processing unit corrects a relative positional deviation between the splitting element and the image sensor by calculating a rotation about a rotation axis.

A computer-implemented method for testing a modulation transfer function or spatial frequency response of an imaging system includes, on a computing device, generating a plurality of accumulation cells running along an accumulation line. A boundary delineation divides a first segment of a digital test image captured by the imaging system from a second segment, and the plurality of accumulation cells collectively comprise a one-dimensional accumulation array. For each of the accumulation cells, a projection ray is generated that extends through the accumulation cell and through the digital test image Each accumulation cell is loaded with an accumulated pixel value based on pixel values sampled from each of a plurality of sampling locations along the projection ray. The modulation transfer function or spatial frequency response of the imaging system is derived from the one-dimensional accumulation array.