An apparatus including a camera optical element and a tactile indicator associated with the camera optical element for indicating a property of the camera optical element.

A camera module and an array camera module based on an integral packing process are disclosed. The camera module or each of the camera module units of the array camera module includes a circuit board, an integral base, a photosensitive element operatively connected to the circuit board, a lens, a light filter holder installed at the integral base and a light filter installed at the light filter holder. The light filter is not required to be directly installed to the integral base, so that the light filter is protected and the requiring area of the light filter is reduced.

A display module includes a first filter layer, a light-emitting layer, a second filter layer, a photosensitive element, and a driving assembly. The light-emitting layer is disposed between the first filter layer and the second filter layer, the second filter layer is disposed between the light-emitting layer and the photosensitive element, and the second filter layer and the photosensitive element are opposite each other. The driving assembly drives the second filter layer to rotate, so that the second filter layer has a first state and a second state. In the first state, the first filter layer and the second filter layer constitute an ambient-light filter structure; in the second state, the first filter layer and the second filter layer constitute an ambient-light light transmission structure. A first light sensing amount of the photosensitive element is smaller than a second light sensing amount of the photosensitive element.

In a spectroscopic module, a light shielding member is disposed between a plurality of bandpass filters and a light detector. The light shielding member includes a plurality of wall portions. The plurality of wall portions are arranged along an X direction with a light passage opening interposed therebetween, each of a plurality of optical paths from the plurality of bandpass filters to a plurality of light receiving regions passing through the light passage opening. A first wall portion and a second wall portion adjacent to each other among the plurality of wall portions are in contact with the bandpass filter, the bandpass filter corresponding to the light passage opening between the first wall portion and the second wall portion. A width in a Y direction of the light passage opening is larger than a width in the Y direction of the bandpass filter.

A fixing mechanism provided for fixing an optical element includes a first fixing rod and a second fixing rod. The first fixing rod has a first sidewall and forms a first groove. The first sidewall is connected to a first extending portion protruding outward from the first sidewall and a first abutting portion. The first groove is located beside the first extending portion. The first extending portion is connected between the first sidewall and the first abutting portion. The second fixing rod has a second sidewall and forms a second groove. The second groove faces the first groove. A first end of the optical element is accommodated in the first groove, and a second end of the optical element is accommodated in the second groove. The first abutting portion abuts against the optical element thereby fixing the optical element in the fixing mechanism. A projection device is also provided.

A camera filter unit (10) includes a front ring (4) for holding a polarization filter (2) and a rear ring (5) for rotatably holding the front ring (4). The front ring (4) includes a rear annular wall portion (18) extending in a radial direction (R), a rear annular plate portion (19) extending rearward from the inner peripheral end of the rear annular wall portion (18), and an annular projection portion (20) projecting for a short distance from the rear end of the rear annular plate portion (19) toward the outer peripheral side. The rear annular wall portion (18), the rear annular plate portion (19), and the annular projection portion (20) form an annular recess (21) on the outer peripheral surface of the front ring (4). The rear ring (5) includes an annular protrusion (45) protruding to the inner peripheral side. The annular protrusion (45) is inserted into the annular recess (21) of the front ring (4).

An array of optical filters having a front side and a back side is disclosed. The array of optical filters includes first and second optical filters and a molding compound. The first and second optical filters each include a substrate having a back surface coplanar with the back side of the molding compound, and a filter layer having a front surface coplanar with the front side of the molding compound. The molding compound covers the sidewalls of the filter substrates and filter layers, and fills gaps between the filters.

A lens includes a lens body comprising a cylindrical surface along an optical axis direction and a fixed portion radially outwardly protruding from the lens body, comprising a diameter diminishing more and more from an image side toward a subject side along an optical axis of the lens body, and including an inclined surface contiguous to the cylindrical surface of the lens body.

Presented herein is an optical filter system for visible light, which has a first average transmittance T.sub.1 between a limit wavelength λ.sub.G and a wavelength of 700 nm and a second average transmittance T.sub.2 between a wavelength of 380 nm and the limit wavelength λ.sub.G. In this case: 410 nm<λ.sub.G<520 nm and 0.05

[00001]$<\frac{T_1}{T_2}<0.60.$

Provided is a lens module including a lens, a lens barrel for accommodating the lens, a lens seat, and an optical filter disposed in the lens seat. The optical filter divides a space defined by the lens barrel and the lens seat into a first space and a second space. The first space is located at an object side of the optical filter, and the second space is located at the image side of the optical filter. The lens seat is provided with an exhaust channel communicating the first space with the outside. An air guiding groove is formed by recessing from installation surface towards the object side and communicates the second space with the exhaust channel. The air guiding groove includes a first groove close to the first space and a second groove extending from an end of the first groove while being bent towards the inner ring surface.