This patent provides a method and apparatus for acquiring imagery with improve spatial resolution through an apparatus called a “light painting imaging device”. Other aspects of this invention correct for barrel distortion and pincushion distortion.

Tunable optical device comprising an actuator, a transmission element, a mount and an optical component, wherein the optical component comprises a window member and a ring member, wherein an optical property of the optical component is adjustable by altering the position of the ring member with respect to the window member. The actuator is arranged to generate an actuation force along an axial direction, the transmission element is arranged to transmit the actuation force from the actuator to the optical component, the transmitted actuation force alters the position of the ring member with respect to the window member. The transmission element comprises a bridge portion and a meander portion, wherein the bridge portion couples the ring member to the actuator and the window member is attached to the mount, or the bridge portion couples the window member to the actuator and the ring member is attached to the mount. The meander portion couples the bridge portion to the mount, and a stiffness of the bridge portion is larger than a stiffness of the meander portion along the axial direction, and a stiffness of the meander portion in directions obliquely with respect to the axial direction is larger than the stiffness of the meander portion along the axial direction.

Disclosed example video extensometers include: a load string configured to secure a test specimen; an imaging device configured to capture images of a surface of the test specimen when secured in the load string; a storage device configured to store a plurality of first calibration parameters corresponding to intrinsic properties of the imaging device; and control circuitry configured to: perform a verification process using the first calibration parameters to verify that a plurality of second calibration parameters correspond to an arrangement of the test specimen with respect to the imaging device; and perform an optical strain measurement process to measure displacement of the test specimen based on the first calibration parameters and the second calibration parameters.

An embodiment comprises: a base including a body having an opening, and a first post portion, a second post portion, a third post portion, and a fourth post portion which protrude from the body; a bobbin disposed on the body; a coil disposed around the bobbin; a first magnet disposed between the first post portion and the second post portion; a second magnet disposed between the third post portion and the fourth post portion; a lower elastic member coupled to the lower portion of the bobbin and the base; and an upper elastic member coupled to the upper portion of the bobbin and the first to fourth post portions, wherein the lower elastic member is disposed inside the first to fourth post portions of the base, and the lower elastic member is coupled to the base between the first post portion and the fourth post portion adjacent to the first post portion.

The light source unit includes a base provided with an opening, a support member fixed to the base at the opening, and a light source assembly fixed to the support member at the opening. The light source assembly includes a light source emitting laser light, a lens disposed on an optical axis of the laser light, and a holding member holding the light source and the lens. The support member has a convex receiving surface extending along the spherical surface so as to surround the optical axis when viewed from a direction parallel to the optical axis. The light source assembly is fixed to the support member by coupling the holding member to the receiving surface at a contact portion with the receiving surface. The receiving surface has a portion located on a side away from the optical axis with respect to a coupling part with the holding member.

To enable a user to quickly adjust power ranges of a scope for firearms, a scope may be provided with a primary sight having a primary sighting line and a secondary sight having a secondary sighting line. The primary sight may include a plurality of optical elements disposed within the first housing and an elevation adjustment mechanism for adjusting a zeroed-in position of the primary sight. To prevent impedance of the secondary sighting line, the elevation adjustment mechanism may be located laterally of the primary sight rather than in the conventional position above the primary sight.

Provided is a lens assembly, which comprises: a first optical lens module, comprising a first carrier and at least one first optical lens received in the first carrier; and a second optical lens module, comprising a second carrier, at least one second optical lens received in the second carrier, and a bearing portion connected to the second carrier. A lower end portion of the first carrier extends to the bearing portion, so as to constrain the relative positions of the first optical lens module and the second optical lens module.

A sun-powered smoking pipe with a lens suspended by two arms, whose arms hold the lens at a fixed distance from the pipe's bowl, the distance being equal to the focal length of the lens. The arms have equal lengths and swivel in tandem both at their attachment points to the lens and at their attachment points to the pipe so that the entire device can be folded flat quickly. The only calibration required by a user is to rotate the lens so that the focal point is aimed inside the bowl when the lens is held in the direction of the sun.

Embodiments provide a lens moving apparatus including a bobbin having a lens barrel, a housing configured to accommodate the bobbin, an upper elastic member coupled to the bobbin and the housing, a lower elastic member coupled to the bobbin and the housing, a first coil disposed on the bobbin, a first magnet disposed on the housing, a circuit board disposed below the housing, a second coil disposed on the circuit board, a first sensor to output a first output signal based on a sensed result of a magnetic field strength of the first magnet, a first capacitor connected in parallel to the first sensor.

An assembly for collimating broadband radiation, the assembly including: a convex refractive singlet lens having a first spherical surface for coupling the broadband radiation into the lens and a second spherical surface for coupling the broadband radiation out of the lens, wherein the first and second spherical surfaces have a common center; and a mount for holding the convex refractive singlet lens at a plurality of contact points having a centroid coinciding with the common center.