Portable corneal topographers and portable corneal topographer modules are disclosed. In one embodiment, a corneal topographer module comprises a housing having a first aperture and a second aperture formed therethrough; and a plurality of optical components disposed within the housing. The plurality of optical components are arranged to direct light generated by a light source through the first aperture to the cornea via a first optical channel when a cornea of a patient's eye is located adjacent to the first aperture; and direct reflected light from the cornea into the housing through the first aperture and to a light detector of a mobile device via a second optical channel when the corneal topographer module is mechanically coupled to the mobile device.

Disclosed herein are techniques for aligning a collimator assembly with an array of LEDs and apparatuses formed using the disclosed techniques. According to certain embodiments, a display projector includes a display device and a collimator assembly. The display device includes a backplane including a first plurality of features. The display device further includes a plurality of dies. Each die of the plurality of dies comprises a plurality of light emitting diodes and is bonded to the backplane. The collimator assembly includes a plurality of lenses and a second plurality of features. The collimator assembly is attached to the display device through coupling the first plurality of features with the second plurality of features such that the plurality of dies are aligned with the plurality of lenses.

There is provided imaging devices and methods of forming the same, the imaging devices, including: a photodetector layer; and a light-blocking member stacked above the photodetector layer, where the light-blocking member includes at least one light-transmitting portion and at least one lens portion.

A lens array unit includes a lens array including a plurality of lenses, a first side plate, and a second side plate, the first side plate and the second side plate being configured to hold the plurality of lenses therebetween, and a frame made of resin and including a first supporting portion and a second supporting portion, the first supporting portion being in contact with an outside surface of the first side plate, the second supporting portion being in contact with an outside surface of the second side plate, the first supporting portion and the second supporting portion being configured to hold the lens array therebetween and support the lens array. The outside surface of the first side plate includes a plurality of first concave portions spaced from each other in an array direction of the lenses and configured to fit with the first supporting portion.

The disclosed liquid lens array may include a plurality of independently operable array sections, each of which may include (1) a transparent base layer, (2) an aperture plate overlapping the transparent base layer, the aperture plate defining a plurality of apertures extending through the aperture plate between an inner surface of the aperture plate facing the transparent base layer and an outer surface of the aperture plate, and (3) a liquid reservoir disposed between the base layer and the aperture plate. The liquid lens array may also include driving circuit for operating at least one array section of the plurality of array sections to change liquid volumes extending from the liquid reservoir at least partially through the apertures defined in the aperture plate of the at least one array section. Various other methods, systems, and devices are also disclosed.

A rod lens array unit includes at least a rod lens array that includes a plurality of rod lenses arranged in a line, each of the rod lenses having an optical axis extending in an optical axis direction, and a pair of side plate parts stacked so as to sandwich the rod lens array. Wherein, end faces of the side plate parts in the optical axis direction of the rod lens array are positioned inside an end face of the rod lens array in the optical axis direction.

A lens array includes a flat plate-shaped base part, a plurality of lenses, a plurality of columnar light guiding parts and a plurality of light shielding parts. The lenses are formed on one surface of the base part. The columnar light guiding parts are formed on another surface of the base part at points corresponding to the lenses. The light shielding parts are formed at least on lateral surfaces of the light guiding parts.

A lens plate includes a transparent substrate wafer, and a plurality of lenses and spacers that are formed of a single portion of material on the transparent substrate wafer. An assembly includes a first lens plate that includes a first transparent substrate wafer, a plurality of first lenses and a plurality of spacers, the first lenses and spacers being formed of a single portion of material on said first transparent substrate wafer. The assembly also includes a second lens plate that includes a second transparent substrate wafer and a plurality of second lenses formed thereon, each of the plurality of second lenses corresponding to a respective one of the plurality of first lenses. The lens plates are aligned such that each of the plurality of first lenses aligns with the respective one of the plurality of second lenses, and the lens plates are bonded to one another.

An optical module (10) having at least one beam-forming element (14) and having at least two retainer brackets (20) for fastening the optical module (10) to a carrier (30) are provided. In this connection the retainer brackets (20) have a first support element (22a) at a first spacing with respect to the lens (14) and a second support element (22b) at a second spacing different from the first spacing with respect to the beam-forming element (14) in order to selectively fasten the optical module (10) to the carrier (30) at the first spacing or at the second spacing.

A lens apparatus includes an imaging optical system includes an imaging optical system including a plurality of lenses, a first holding member holding at least a first lens closest to an object among the plurality of lenses, and configured to move in an optical axis direction of the imaging optical system to perform focusing, a barrel member provided on an outside of the first holding member, and a control unit configured to control a driving unit configured to move the first holding member. When focus is at infinity, an edge surface on an object side of the barrel member is positioned on the object side of a surface vertex of an object-side surface of the first lens. When focus is at infinity, an edge surface on the object side of the control unit is positioned on the object side of the surface vertex.