Abstract: A calibration method and apparatus are provided. The calibration method includes sensing spots at which collimated light passing through multiple lenses is imaged on a sensor and determining a transformation matrix configured to restore an image acquired using the multiple lenses based on the spots.

Abstract: An imaging apparatus includes a light receiving device array having light receiving devices two-dimensionally arranged in both a row direction and a column direction, and a light transmissive filter disposed in front of the light receiving device array, wherein the light transmissive filter includes plural types of band-shaped light transmissive sections having respective, different light transmissive characteristics, and the plural types of band-shaped light transmissive sections are arranged in sequence in a width direction thereof.

Abstract: An external mask-based radiance camera may be based on an external, non-refractive mask located in front of the main camera lens. The mask modulates, but does not refract, light. The camera multiplexes radiance in the frequency domain by optically mixing different spatial and angular frequency components of light. The mask may, for example, be a mesh of opaque linear elements, which collectively form a grid, an opaque medium with transparent openings, such as circles, or a pinhole mask. Other types of masks may be used. Light may be modulated by the mask and received at the main lens of a camera. The main lens may be focused on a plane between the mask and the main lens. The received light is refracted by the main lens onto a photosensor of the camera. The photosensor may capture the received light to generate a radiance image of the scene.

Abstract: An external mask-based radiance camera may be based on an external, non-refractive mask located in front of the main camera lens. The mask modulates, but does not refract, light. The camera multiplexes radiance in the frequency domain by optically mixing different spatial and angular frequency components of light. The mask may, for example, be a mesh of opaque linear elements, which collectively form a grid, an opaque medium with transparent openings, such as circles, or a pinhole mask. Other types of masks may be used. Light may be modulated by the mask and received at the main lens of a camera. The main lens may be focused on a plane between the mask and the main lens. The received light is refracted by the main lens onto a photosensor of the camera. The photosensor may capture the received light to generate a radiance image of the scene.

Abstract: An external mask-based radiance camera may be based on an external, non-refractive mask located in front of the main camera lens. The mask modulates, but does not refract, light. The camera multiplexes radiance in the frequency domain by optically mixing different spatial and angular frequency components of light. The mask may, for example, be a mesh of opaque linear elements, which collectively form a grid, an opaque medium with transparent openings, such as circles, or a pinhole mask. Other types of masks may be used. Light may be modulated by the mask and received at the main lens of a camera. The main lens may be focused on a plane between the mask and the main lens. The received light is refracted by the main lens onto a photosensor of the camera. The photosensor may capture the received light to generate a radiance image of the scene.

Abstract: A lens module (100) includes a barrel (10), a lens (20), an image sensor module (30) and a grating (22). The lens is received in the barrel for focusing optical signals. The image sensor module is installed on an end of the barrel for receiving and transforming the optical signals. The grating is formed on the lens for preventing unnecessary optical signals from being received by the image sensor module.

Abstract: A lens-fitted photo film unit is pre-loaded with photo film. A photometric circuit measures object brightness of a photographic object, and determines which of high brightness or low brightness the object brightness is according to comparison with a predetermined reference brightness level. A mode selector in a button shape sets a selected one of an AE mode and a night scene mode. A combination of stationary and movable aperture stop plates changes over a photographic light path in a selected one of small, middle and large aperture stop states. The movable aperture stop plates set the light path in the small aperture stop state when the AE mode is determined and also upon detection of the high brightness. The light path is set in the middle aperture stop state when the AE mode is determined and also upon detection of the low brightness. The light path is set in the large aperture stop state when the night scene mode is determined.

Abstract: A first light guide and a second light guide are attached to a flash charge switch. Each light guide is arranged in a direction where the flash charge switch is slid. If the flash charge switch is in an OFF position, the first light guide transmits light from a photometric window to a photo sensor. If the flash charge switch is in an ON position, the second light guide transmits the light through the photometric window to the photo sensor. As the first light guide has a short distance from an incident end to the photometric window, the incident end has a large incident angle and brighter light is transmitted to the photosensor. As the second light guide has a long distance from the incident end to the photometric window, weak light is transmitted to the photo sensor. When an output signal of the photo sensor is above a predetermined value, a solenoid is activated to set a stop plate on a photographic light path. The stop plate is formed with a small stop aperture.

Abstract: In a camera having a camera body part and a lens barrel part, an optical filter arranged to be rotatable around an axis located inside a lens optical path derived from the lens barrel part (for example, around an axis substantially parallel with an optical axis of the lens barrel part), and a filter rotating part having a drive source (for example, an electric motor) for rotating the optical filter are contained in the camera body part.

Abstract: A controller controls a termination time of an application of a voltage to an electro-developing recording medium such that an image can be recorded and developed with optimum contrast. The controller has a power source for applying a voltage to the medium, a transparency sensor for detecting a transparency of the medium, and a differentiator for differentiating a value of the detected transparency. The controller also has a comparator, a determiner, and a stopper. The comparator compares the differentiated value with a predetermined threshold level. The determiner determines whether or not the differentiated value is greater than or equal to the predetermined threshold level. The stopper stops the application of the voltage to the medium when the determiner determines the differentiated value is greater than or equal to the predetermined threshold level.

Abstract: A shutter apparatus is provided wherein openings for defining a secondary aperture are formed in respective shutter blades, such that an amount of light transmitted through the secondary aperture is detected, and the drive force for driving the shutter blades is changed so that the amount of the received amount increases in the opening stroke according to a predetermined function. When the integrated quantity of the received light reaches a threshold value, the movement of the shutter blades is reversed, and the shutter speed is determined based on the integrated light quantity obtained upon completion of shifting to the closing stroke. Thus, variations in the exposure amount that occur upon reversal of the shutter blades are canceled in the closing stroke.

Abstract: A photometric device, to measure light incident from a photographic lens of a camera, which can perform accurate photometry, independently of the direction of polarization of the incident light. The photometric device is provided with a first semi-transparent mirror, located between the photographic lens and an imaging plane of the camera, for dividing incident light from the photographic lens into a reflected beam and a transmitted beam. A second semi-transparent mirror is located in a position where the reflected beam from this first semi-transparent mirror is incident, and divides the incident light into a reflected beam and a transmitted beam. A photometric unit, for performing photometry, is located in a position to receive light of the transmitted beam from the second semi-transparent mirror.

Abstract: A camera body has at least one opening formed in a front position thereof for receiving optical information about a subject. A remote control light sensor is provided within the camera body to receive a remote control light signal emitted from an external remote control transmitter. An optical unit is placed between the opening and the remote control light sensor to direct at least the remote control light signal onto the light sensor. A control unit is responsive to an output of the remote control light sensor to control a predetermined operation associated with the camera body.

Abstract: A film package including sheets of imaging media or film sandwiched between upper and lower stiffeners and enclosed by an envelope. Adhesive strips secure the stiffeners together at overlapping tabs formed on opposite sides of the stiffeners. The stiffeners with the film sheets are removed from the envelope by opening one side of the envelope. The adhesive strips also have tear strips for allowing removal of the upper stiffener after the package has been placed in a drawer of a printer with the aid of offset tabs on the stiffeners which indicate and assure proper orientation. A notch in the corner of the lower stiffener allows a signal to be passed to indicate whether the upper stiffener has been removed. The lower stiffener is also apertured to receive a signal for indicating whether any film sheets remain on the stiffener while in the drawer of the printer.