A lens assembling device includes a collimator, a sensor, a feedback control platform located between the collimator and the sensor, a lens transfer component, and a processor electrically or signal connected to the feedback control platform, the sensor, and the lens transfer component, respectively. A method for assembling lenses by the lens assembling device is also disclosed.

A precision tabletop for scientific instrumentation is described. The tabletop may be manufactured from as few as two pieces of material, include a honeycomb stiffening and vibration damping structure, be sealed from fluid ingress, include interior reinforcing structures, and permit accurate registration of machined features on all sides of the tabletop.

A precision tabletop for scientific instrumentation is described. The tabletop may be manufactured from as few as two pieces of material, include a honeycomb stiffening and vibration damping structure, be sealed from fluid ingress, include interior reinforcing structures, and permit accurate registration of machined features on all sides of the tabletop.

Embodiments described herein relate to apparatus for measuring and characterizing performance of augmented and virtual reality waveguide structures utilizing glass substrates. The waveguide performance measuring systems generally include a light source configured to direct light towards an incoupling grating area on waveguide and one or more light detectors configured to collect light from an outcoupling grating area on a second side of the waveguide. The light source and one or more light detectors are disposed on one or more adjustable stages positioned about the waveguide. In certain embodiments, the one or more adjustable stages are configured to move in a linear fashion or revolve and/or rotate around the waveguide in an orbital motion.

A composite structure includes a top skin defining a plurality of clearance apertures, a core and a bottom skin together with a fastening layer interposed between the top skin and the upper surface of the core. The fastening layer defines a plurality of threaded apertures in alignment and registration with the plurality of clearance apertures formed in the top skin. The threaded apertures each define a threaded aperture size which facilitates threaded fasteners being passed through the clearance apertures of the top skin to threadably engage the threaded apertures of the fastening layer. The top skin, fastening layer, core and bottom skin are joined by conventional attachment such as adhesive attachment, welding or the like.

A composite structure includes a top skin defining a plurality of clearance apertures, a core and a bottom skin together with a fastening layer interposed between the top skin and the upper surface of the core. The fastening layer defines a plurality of threaded apertures in alignment and registration with the plurality of clearance apertures formed in the top skin. The threaded apertures each define a threaded aperture size which facilitates threaded fasteners being passed through the clearance apertures of the top skin to threadably engage the threaded apertures of the fastening layer. The top skin, fastening layer, core and bottom skin are joined by conventional attachment such as adhesive attachment, welding or the like.

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.

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.

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.

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.