Abstract: An optical network unit (ONU) comprising a first optical fiber, a first optical circulator coupled to the first optical fiber, a first seed light injected laser coupled to the first optical circulator, wherein the first optical circulator is positioned between the first seed light injected laser and the first optical fiber, and a second seed light injected laser coupled to the first optical circulator and the first seed light injected laser, wherein the first optical circulator is positioned between the second seed light injected laser and the first optical fiber. Also disclosed is a method comprising receiving a seed light signal, amplifying the seed light signal using seed light injection locking, thereby producing an amplified seed light signal, and producing an optical signal using the amplified seed light signal and seed light injection locking, wherein the optical signal has about the same wavelength as the seed light signal.

Abstract: A method for designing a communication network is provided. Network demand data is gathered and network architecture data is gathered. Based in part on the network demand data and the network architecture data, a network plan is automatically generated.

Abstract: An image taking device (1), which takes an image of an object by focusing reflected light from the object on an image sensor (212), is provided with a distance measuring sensor (27) for measuring a distance between the object and the image taking device (1), and means for controlling exposure time of the image sensor (212) upon taking an image in accordance with a measurement result.

Abstract: In a camera, a zoom lens and focus lens are driven to predetermined positions corresponding to a zoom magnification factor to be changed upon a demand for altering the zoom magnification factor. During a zooming operation after the camera has been brought into focus by an auto-focusing function, driving rates of the zoom lens and focus lens are controlled in each of zoom intervals to set driving times required to drive the zoom lens and focus lens to positions corresponding to the next zoom magnification factor to the quickest zoom driving time Tz of the zoom lens and the longer driving time among the quickest focus driving times Tfa, Tfb of the focus lens corresponding to object distances.

Abstract: A camera device is provided which has an optical system including a focus lens, focus control for focusing the optical system on a subject by driving the focus lens, and display control for causing a display to display numerals indicating a first distance of a close end and a second distance of a remote end of a subject distance range in which the focus control can focus the optical system.

Abstract: A camera is provided with a photographing device for setting various photographing conditions which determine a state of a subject image to be obtained as a picture, the photography device including an exposure device having a Plurality of selectively settable exposure modes for automatically setting at least one exposure value based on brightness of a subject, a mode selector for selecting one of the plurality of exposure modes, a calculation unit for calculating an amount indicative of the state of the subject image in accordance with the photographing conditions set by the photography device, an estimation unit for estimating visual effects which the subject image provides based on the calculated state amount, and a display device for displaying the visual effect corresponding to the exposure mode selected by the mode selection means in accordance with the estimated visual effects.

Abstract: A camera, such as a video camera or other electrically recordable camera, has scale imprintable capabilities and a method for imprinting a scale onto memory storage media. The camera and method imprints, optically or electrically, a standard scale on memory storage media for the purpose of estimating the size of a subject image. A photographic magnification calculation circuit calculates the photographic magnification based on a subject distance, and a reference scale setting circuit sets a reference scale for the purpose of estimating the size of the subject image on the memory storage media regardless of the magnification during picture taking or print size. An imprinting circuit imprints, optically or electrically, the reference scale onto the memory storage media in accordance with the reference scale setting circuit, and only when needed or wanted. The reference scale can be imprinted in a vertical or horizontal direction in accordance with a mode selection switch.

Abstract: A light-projecting unit projects distance measurement light onto an object to be photographed. A light quantity detecting unit splits, from steady light, the reflected signal light quantity of the distance measurement light from the object on the basis of the light received by a sensor, and detects the reflected signal light quanity. A sensor array constituted by a pair of sensor arrays monitors the luminance distribution of light which steadily irradiates the object. Normally, a CPU calculates the distance to the object on the basis of the luminance distribution output from the sensor array. When the object has a low luminance or contrast, the CPU calculates the distance to the object on the basis of the reflected signal light quantity received by the sensor.