摘要:
A real image mode variable magnification finder optical system is provided with an objective system having a positive refracting power, a correctly erect image forming system having a plurality of reflecting members for converting an intermediate image formed by the objective system into a correctly erect image, and an eyepiece system having a positive refracting power. The objective system includes a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, and a third lens unit having a negative refracting power. At least one of the light reflecting members is arranged between the third lens unit and a position of said intermediate image, and the first, second and third lens units are adapted to be moved along the optical axis when magnification of the optical system is to be changed. Thus, the finder optical system enables one to change magnification thereof with high ratios and to form a good image of visual field with decreased flare.
摘要:
An optical system composed, in order from the object side, of a first lens unit which has a positive power or is powerless, a second lens unit which has a positive power, a third lens unit which has a positive power and a fourth lens unit which has a negative power, and configured to change its magnification by varying airspaces reserved between the lens unit. The fourth lens unit is composed of a single lens element or the optical system as a whole is composed of lens element in a number not exceeding twice a number of movable lens units. The optical system is composed of a small number of lens elements and compact.
摘要:
A real image mode variable magnification finder optical system is provided with an objective system having a positive refracting power, a correctly erect image forming system having a plurality of reflecting members for converting an intermediate image formed by the objective system into a correctly erect image, and an eyepiece system having a positive refracting power. The objective system includes a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, and a third lens unit having a negative refracting power. At least one of the light reflecting members is arranged between the third lens unit and a position of said intermediate image, and the first, second and third lens units are adapted to be moved along the optic axis when magnification of the optical system is to be changed. Thus, the finder optical system enables one to change magnification thereof with high ratios and to form a good image of visual field with decreased flare.
摘要:
A camera includes a finder optical system having an objective optical system and an eyepiece optical system, independent of a photographic optical system, and a range measuring optical system. A path splitting member Is disposed in the optical path of the objective optical system to make an optical axis of incident light introduced from the objective optical system into the eyepiece optical system coincide with an optical axis of the range measuring optical system, and satisfies conditions:650 nm.ltoreq..lambda.(R.sub.0).ltoreq.850 nmR.sub.0 =[R(550 nm)+R(900 nm)]/2where .lambda.(R.sub.0) is the wavelength at which the reflectance of the path splitting member regarding an axial ray changes to R.sub.0, and R(550 nm) and R(900 nm) are the reflectances of the path splitting member where the wavelengths of axial rays are 550 nm and 900 nm, respectively.
摘要:
An apparatus and a method for detecting the temperature of a substrate, and for controlling the radiation-annealing of the substrate, for example, measures the intensity of infrared light from the substrate when the substrate is irradiated by measuring infrared light and also when the substrate is not irradiated by the infrared light. The temperature is calculated from the transmissivity and emissivity of the substrate, which are calculated from the intensity measurements.
摘要:
A noise reduction system which is unaffected by bandwidth limitations of the transmission system with which the noise reduction system is employed. The noise reduction system is of a type including a compressor, the transmission system, which receives a compressed signal from the compressor, and an expander for expanding a signal outputted by the transmission system. In accordance with the invention, a low-pass filter having a pass band corresponding to the transmission band of the transmission system is provided in the stage prior to the compressor. In another embodiment, a low-pass filter is provided in a stage prior to a level detector within the compressor.
摘要:
A reflection controllable view mirror device having an electro-optical assembly which changes its optical transmittance to vary quantity of light passing therethrough in accordance with the magnitude of the applied voltage, a control circuit to control the transmittance at a value so as to ensure predetermined uniform reflection under circumstances permitting transmittance to deviate from inherent one because of deterioration or the like. Another control circuit is provided to control to ensure the inherent transmittance for predetermined reflection under the same circumstances.
摘要:
A target ship includes a hull travelling at a predetermined depth below the water level, and a pair of poles between which a target is attached, the target being disposed above the water level.
摘要:
A headphone includes a pad which is brought into contact with a human head, an enclosure which outputs an audio, and a dome as means for adjusting quality of the audio output by resonating or absorbing the sound wave emitted from the enclosure. The dome has no parts other than those used for absorbing and reflecting audio and is almost hollow. In the dome is arranged a circuit substrate by using a circuit support part having a shape not blocking the air flowing in the dome. Such a circuit substrate is also built in the other headphone. The circuit substrates arranged in the dome of the headphone are connected by a cable arranged inside a head band or an FPC for transmission of a signal and power supply. Thus, it is possible to provide an output device which can solve the problem of the dimensions for containing operation processing devices and the problem of heat dissipation.
摘要:
An object is to provide a content reproduction system in which matching of a content reproduction apparatus and a device is performed flexibly and efficiently. For this purpose, the content reproduction system includes a content reproduction apparatus which reproduces a content including at least one of audio and an image, and a device connected to the content reproduction apparatus, in which the content reproduction apparatus is provided with acknowledging unit which acknowledges a driving condition of the device and a controlling unit which operates according to the acknowledged driving condition.