Abstract: A light source having a lamp for generating light generates a lamp on signal at an output terminal thereof when the lamp is lit. A lamp life meter is connected to the light source for detecting the time that the lamp has been lit. The lamp life meter includes a housing having at least one contact terminal adapted to be coupled to the output terminal of the light source, a clock generator located in the housing and generating clock signals, a counter located in the housing and counting the clock signals whenever the clock on signal indicates that the lamp is on and a display mounted in the housing for displaying an indication of the time the lamp has been turned on.

Abstract: An endoscope apparatus including an endoscope, a supply portion for supplying a required signal or energy to a peripheral unit relating to the endoscope; and a control portion for controlling the supply portion, wherein the control portion is constituted to have at least one field programmable gate array and a function required by at least either of the endoscope or the peripheral unit relating to the endoscope is realized by receiving circuit information for constituting a control circuit for controlling the supply portion to selectively write the circuit information on the field programmable gate array so that the control circuit is constituted.

Abstract: A light source device including a lamp-exchanging door which is attached/removed when a lamp is replaced and an electrode-connection/separation arrangement for making connection/separation between an electrode of a lamp driving circuit and an electrode of a lamp when the lamp-exchanging door is attached/removed.

Abstract: A position and orientation state pickup is designed to detect the position and orientation state of an endoscope inserted into a living body without any adverse effect on the living body, which is often observed in X-ray analysis. The position and orientation state pickup, generating an electro-magnetic field with frequency at least lower than the visible ray range toward the body from outside; detects influence of the endoscope inserted into the body on two-dimensional energy distribution of the electro-magnetic field generated toward the body; and show the position and orientation state of the endoscope from the detection results.

Abstract: A reel table shifting device is adapted to accommodate tape cassettes in a range of differant sizes. The reel table shifting device includes a pair of reel tables adapted to support the tape cassette, a driving mechanism for moving the reel tables between a plurality of mount positions such that the cassette can be mounted at one of the mount positions depending upon the size of the cassette, and an intermediate stopper mechanism operative to arrest movement of the reel tables in a precise predetermined intermediate mount position independent of the direction of movement of the reel tables towards such intermediate mount position.

Abstract: This endoscope light source apparatus can feed an illuminating light to an endoscope requiring a white color light as an illuminating light and to an endoscope having a field sequential type imaging apparatus and requiring as an illuminating light a field sequential light sequentially switched to lights in different wavelength ranges and comprises a light source emitting a white color light, a converting apparatus interposed in the light path of the light emitted from the light source at least at the time of outputting a field sequential light and converting the white color light emitted from the light source to a field sequential light, a selecting apparatus selecting the kind of the emitted light from among a white color light and field sequential light and a light amount controlling apparatus whereby, when a field sequential light is selected by the selecting apparatus, during the exposure period of the field sequential type imaging apparatus, the light amount of the light source can be increased to be lar

Abstract: In this out-body observing apparatus, an illuminating light fed by an illuminating device is emitted from the tip part of an insertable part of an endoscope inserted into a body cavity and is radiated onto a part to be observed. This illuminating light having passed through a living body tissue is imaged by an imaging device provided outside the body. This imaging means delivers a picture image signal to a signal processing device. This signal processing device processes the signal and outputs a video signal to a displaying device. This displaying device displays on a picture surface the image of the observed part of the tissue within the living body.

Abstract: A white light of a lamp, which can flash, is passed through a rotary filter fitted with a plurality of color filters to output field sequential type colored light. An output signal of a color filter detecting device, detecting the timing when the color filters are interposed in a light path, is used to produce trigger signals having different delay amounts. The light emitting timing of the lamp is delayed relatively from the time when the color filters are interposed in the light path to control the emitted light amounts of the colored light.

Abstract: A white light of a lamp which can flash is passed through a rotary filter fitted with a plurality of color filters to output colored lights of a field sequential type. An output signal of a color filter detecting device, detecting the timing when the color filters are interposed in a light path, is used to produce trigger signals different in the delay amount. The light emitting timing of the lamp is delayed relatively from the time when the color filters are interposed in the light path to control the emitted light amounts of the colored lights.

Abstract: An electronic endoscope comprising an endoscope unit and a light source unit. The endoscope includes a light guide and a CCD for imaging the object. The light source unit includes a continuously lighting lamp (e.g., xenon lamp), for use as a light source for observation, and a flashing stroboscope as a light source for still-picture recording. An illumination light from the lamp or the stroboscope is applied alternatively to a light guide. A rotary filter is located in front of the light guide. Every time it makes one revolution, the filter colors the illumination light red, green, and blue, in succession, with shielding periods between coloring periods. The CCD is stored with signal charge corresponding to image information during a coloring period, and outputs an output signal during a shielding period thereafter. The output of the CCD is supplied to the light source unit, and is transmitted through a multiplexer to be stored in any of frame memories.

Abstract: An electrosurgical apparatus includes a radio frequency (RF) power source for supplying an RF signal to an object to be cauterized through a treatment tool and an electrode plate. A dummy load with a certain impedance is coupled in the current path from an active terminal to which the treatment tool is connected to the check terminal connectable to an electrode plate. Before electrosurgical treatment, the dummy load is connected to the active terminal and the check terminal. An actual RF signal flowing through the dummy load is detected and compared with a predetermined RF signal from the RF power source.

Abstract: In an apparatus for recording a video signal on magnetic tape which is helically wrapped on a guide drum having single rotary head for scanning the magnetic tape, one field of the video signal is divided into N segments thereof (where N is an integer) and each of the N segments are time-compressed to ensure a time corresponding to an interval where the single rotary head scans the magnetic tape. The N segments of the video signal are respectively recorded on separate N tracks of the magnetic tape by the single rotary head.