摘要:
In a digital camera, a solid state imaging device is used to catch subject light so that an image signal is created. The digital camera contributes to effectively implementing further thinness as compare with the conventional ones. A focus lens is revolved between a position on the optical axis and a saving position coming into a hollow portion beside the CCD solid state imaging device, so that the focus lens comes into the hollow portion at the time of the collapse.
摘要:
At least one exemplary embodiment is directed to a zoom lens system having a telephoto-type configuration at the telephoto end. When assuming that an Abbe number is vd, and a partial dispersion ratio is θgF, this zoom lens system includes a refractive optical element having positive refracting power made up of a solid material that can satisfy the following conditions: −2.100×10−3·vd+0.693
摘要:
The liquid crystal lens of the invention has an optically transparent liquid crystal plate which includes a plurality of liquid crystal pixels divided two-dimensionally, and a liquid crystal drive section which selects only a part of the liquid crystal pixels simultaneously and controls voltage application to the selected liquid crystal pixels. The liquid crystal drive section performs voltage application control to the selected liquid crystal pixels so as to form, in the liquid crystal plate, a refractive index distribution of light which transmits the liquid crystal plate.
摘要:
Provided is a retrofocus type optical system including a lens or a layer made of a material satisfying the following conditions of the Abbe constant νd and partial dispersion ratios θgd and θgF, νd
摘要:
A lens barrel has its collapsed length that can be further decreased by removing unnecessary space and bringing lens groups close to each other and a photographic apparatus incorporates the lens barrel. When the lens barrel is collapsed, at least a fourth lens group is retracted from a photographic optical axis by an advance/retract mechanism. In that case, a first lens group and third lens group are aligned along the optical axis and stuffed into the lens barrel, the fourth lens group is placed on the top, bottom, right, or left side of these lenses, and a second lens group is placed on the top, bottom, right, or left side of the first and third lens groups. This reduces the length of the lens barrel. During extension, the second and fourth lens groups are advanced onto the photographic optical axis by the advance/retract mechanism to extend the lens barrel greatly.
摘要:
A self light-emitting device 1 has spherical photo-electric converting elements 2 that have a substantially spherical acceptance surface, respectively; a light emitting diode 3 that emits light using electric power generated by the spherical photo-electric converting elements 2; a control circuit 5; and a sealing member 4 that integrates the spherical photo-electric converting elements 2, the light emitting diode 3 and the control circuit 5. The control circuit 5 is equipped with a light emitting control circuit where a photo-detecting sensor 23 is incorporated, a charge control circuit and a condenser. Since the acceptance surface of the spherical photo-electric converting elements 2 is substantially spherical, electric power is generated due to incidental light from any angle. Since the sealing member 4 integrates the constructional elements, so the device is difficult to damage.
摘要:
A lens barrel has its length which is reduced by dispensing with guide rods or a travel mechanism long extending from a base which fixes an image pickup device. The optical axes of multiple lens groups can be easily aligned. An image taking apparatus has its body which has the lens barrel incorporated into it. A second lens group, third lens group and, via the travel mechanism, a fourth lens group are supported by a straight-ahead key ring, and the straight-ahead key ring also supports a front tube holding the first lens group. A zoom motor and a focus motor are also supported by the straight-ahead key ring.
摘要:
A negative-lead type zoom lens has a diffractive optical element and is led by a lens unit having a negative optical power. In this zoom lens, various kinds of aberration including chromatic aberration are excellently corrected by properly setting the lens configuration of each lens unit so as to achieve high optical performance over the entire range of a variable power while the entire lens system is miniaturized and designed to have a wide angle. The zoom lens according to the present invention is suitable for a zoom lens with a wide angle including a wide-angle region that is a focal length of substantially 28 mm on a 35 mm single lens reflex camera basis.
摘要:
A telephone system requiring no upload of station data which is reset or set after a seat change even if the station data is not uploaded to a data management equipment whenever the operation change the station data of an extension communication terminal. Each of the extension communication terminals judges, on receiving a seat-change instruction, whether or not its station data is changed. If the station data is judged to be changed, the station data is uploaded to the data management equipment through a switching system.
摘要:
A windowpane antenna apparatus for vehicles according to the present invention includes a defogger mounted on a window of a vehicle, for defogging the window, means for causing the defogger to serve as a slot antenna, and a driven antenna arranged close and opposite to the defogger with a given gap therebetween in such a manner that one side of the driven antenna is mutually coupled to one side of the defogger.