Smartphone imaging of patterns through and outside a lens retrieves optical parameters accurately without complex lens-meter hardware.
Controlled surface deformations in a defined PV range let optical elements carry manufacturing history without degrading imaging performance.
Dynamic threshold updates improve ophthalmic lens orientation and inversion sorting despite temperature, material, and design variation.
An adjustable aperture stop aligns chief ray angle for testing CMOS image sensors with different lens modules using fewer dedicated sockets.
Retinal retro-illumination reveals lens lathe marks as shadows, enabling precise measurement of ophthalmic lens rotation and decentration.
A laterally offset aligner and movable support keep the lens out of beam shadow, enabling precise mapping with simpler positioning.
Camera assembly variations can disrupt MTF; a variable-focal-length phased metalens estimates lens centration for precise boresight alignment.
Detection units and optical-film nicks make the optical axis visible for accurate lens alignment without expensive inspection equipment.
A camera compares direct and through-lens patterns to retrieve optical parameters without specialized lens-meter equipment.
A ring-shaped mask and collimation optics enable image-based axis and MTF measurement for astigmatic AR/VR components.
Wavefront measurement aligns the aspherical and optical axes while adhesive thickness variation compensates for lens positional deviation.
A wavefront measuring device uses rotational scanning and HDR imaging to capture optical data across multiple azimuthal directions.
Segmented locking mechanism adjusts a limiting block to resolve positioning precision versus adjustability trade-offs.
A lens loosening test device uses an imaging component to capture images of a testing picture card through the lens.
An integrated measurement system detects modulation transfer function and lens centering state simultaneously.
Adjustable flexure assembly aligns optical axes on a vacuum chuck, preventing stress and birefringence in semi-cured adhesive during precision bonding.
An image sensor captures reflections from a plurality of light sources to determine attachable lens characteristics for accurate content display.
A camera module manufacturing device uses inclined measurement charts to form simultaneous images for rapid lens and sensor adjustment.
Transparent index plates enable precise shift and tilt eccentricity measurement within assembled lens barrels.
A spatially resolving optical detector captures light spots from multiple lens surfaces using an extended light source and a vignetting field stop.
A multi-core fiber crosstalk measurement method uses parallel light interference to analyze intensity distributions across cores simultaneously.