Disclosed is a plane grating calibration system, comprising an optical subsystem, a frame, first vibration isolator, a vacuum chuck, a workpiece stage, second vibration isolator, a base platform and a controller; the optical subsystem is mounted on the frame, and the frame is isolated from vibration by the first vibration isolator; the vacuum chuck is rotatably mounted on the workpiece stage, the workpiece stage is positioned on the base platform, and the base platform is isolated from vibration by the second vibration isolator. A displacement interferometer is integrated into the optical subsystem, and the entire optical subsystem adopts a method of sharing a light source, thereby avoiding the problems of low wavelength precision and poor coherence of separate light sources.

Apparatus and methods to automatically inspect precision tabletops used for vibration isolation are described. An inspection head having an imaging device and/or perturbing device can be positioned automatically at a plurality of locations over a precision tabletop. The inspection head can further include a distance sensor that can be used to determine a flatness of a portion or all of a surface of the precision tabletop. The inspection head may further include marking apparatus to automatically mark non-compliant features formed on the precision tabletop.

Apparatus and methods to automatically inspect precision tabletops used for vibration isolation are described. An inspection head having an imaging device and/or perturbing device can be positioned automatically at a plurality of locations over a precision tabletop. The inspection head can further include a distance sensor that can be used to determine a flatness of a portion or all of a surface of the precision tabletop. The inspection head may further include marking apparatus to automatically mark non-compliant features formed on the precision tabletop.

An optical bench tester for a multifocal intraocular lens is disclosed. An optical bench tester for a multifocal intraocular lens according to an aspect of the present disclosure may include a resolution test chart; a plurality of optical systems that refract images irradiated from the resolution test chart; an electrically driven liquid lens unit provided at the rear of the optical system to control the refraction of light passing through; a model eye having a multifocal intraocular lens on which light transmitting through the electrically driven liquid lens unit is incident; a camera that captures light transmitted through the model eye; and a control unit that controls the electrically driven liquid lens unit to control the refractive index of the electrically driven liquid lens unit, and calculates a defocus curve by analyzing images captured through the camera.

An optical bench tester for a multifocal intraocular lens is disclosed. An optical bench tester for a multifocal intraocular lens according to an aspect of the present disclosure may include a resolution test chart; a plurality of optical systems that refract images irradiated from the resolution test chart; an electrically driven liquid lens unit provided at the rear of the optical system to control the refraction of light passing through; a model eye having a multifocal intraocular lens on which light transmitting through the electrically driven liquid lens unit is incident; a camera that captures light transmitted through the model eye; and a control unit that controls the electrically driven liquid lens unit to control the refractive index of the electrically driven liquid lens unit, and calculates a defocus curve by analyzing images captured through the camera.

An optical setup, comprising one or more platforms having a plurality of fixation locations repeatedly arranged, and defining a discrete position coordinate system; and a plurality of modular optical units, each comprising an optical portion defining an optical axis fixedly attached to at least one mounting surface comprising complementary geometry to the fixation locations; wherein a releasable attachment of the plurality of modular optical units at the fixation locations defines a plurality of optical axes at least a portion of the optical axes overlapping across the discrete position coordinate system In some embodiments, the modular optical units include standard optical elements In some embodiments, the platform includes an attachment interface to an optical table and/or another platform In some embodiments, laser pulses are synchronized by fixing a discrete path length over the fixation locations In some embodiments the fixation locations are located on multiple planes in 3D space.

An optical rail system that includes an electronic component mount configured to be mounted on rails between two previously-mounted electronic component mounts without the need of removing one of the two previous-mounted mounts. The electronic component mount includes grooves configured to securely register with respective portions of the rails. The mount further comprises locking devices for securely locking the portions of the rails to the housing within the grooves. The mount additionally includes a dock for securely hosting one or more optical components. Also disclosed is a rail mount for facilitating the mounting the optical rail system to an optical table or other structure. The rail mount includes grooves for securely registering with respective portions of the rails, locking devices for more securely locking the rails within the grooves, and an attachment structure for attaching the rail mount to a post, the post being configured for mounting to an optical table or other structure.

System and method for performance characterization of multi configuration near eye displays includes: a mirror; a lamp; a beamsplitter; a collimating and reflective lens for collimating light reflected from the beamsplitter and reflecting it back towards an image sensor having a view finder; a field-of-view (FOV) aperture to project light from the lamp onto the DUT through the objective lens; a video viewfinder digital camera for capturing an virtual image of the DUT; a spectroradiometers for performing spectroradiometric measurements on a captured image of the defined measurement area to characterize the performance of the DUT; and a controller circuit for characterizing performance of the DUT based on the spectroradiometric measurements.

System and method for performance characterization of multi configuration near eye displays includes: a mirror; a lamp; a beamsplitter; a collimating and reflective lens for collimating light reflected from the beamsplitter and reflecting it back towards an image sensor having a view finder; a field-of-view (FOV) aperture to project light from the lamp onto the DUT through the objective lens; a video viewfinder digital camera for capturing an virtual image of the DUT; a spectroradiometers for performing spectroradiometric measurements on a captured image of the defined measurement area to characterize the performance of the DUT; and a controller circuit for characterizing performance of the DUT based on the spectroradiometric measurements.

System and method for performance characterization of multi configuration near eye displays includes: a mirror; a lamp; a beamsplitter; a collimating and reflective lens for collimating light reflected from the beamsplitter and reflecting it back towards an image sensor having a view finder; a field-of-view (FOV) aperture to project light from the lamp onto the DUT through the objective lens; a video viewfinder digital camera for capturing an virtual image of the DUT; a spectroradiometers for performing spectroradiometric measurements on a captured image of the defined measurement area to characterize the performance of the DUT; and a controller circuit for characterizing performance of the DUT based on the spectroradiometric measurements.