Abstract: An optical unit includes a light source configured to irradiate an object with light, a first polarizing element configured to convert emitted light emitted from the light source to linearly polarized light, a second polarizing element configured to cause reflection light from the object to transmit through the second polarizing element, a polarization axis of the second polarizing element being 90° orthogonal to a polarization axis of the first polarizing element, a first wavelength plate disposed to overlap with the first polarizing element and configured to convert the emitted light from the light source to circularly polarized light or elliptically polarized light, and a second wavelength plate disposed to overlap with the second polarizing element, a phase difference of the second wavelength plate being equal to a phase difference of the first wavelength plate. The first wavelength plate is revolvable and/or the second polarizing element is revolvable.

Abstract: Provided is a lighting device including: a support portion disposed in front of a forehead of a head of a wearer; a light source unit provided to the support portion, the light source unit including a light source which irradiates an object with light, and a condensing lens which condenses the light emitted from the light source; and a transmission member configured to transmit reflected light from the object so as to allow the wearer to visually recognize the reflected light, the transmission member being provided to the support portion and disposed in front of an eye of the wearer, wherein the light source unit includes a first polarizing element which converts emitted light emitted from the light source to linearly polarized light, and the transmission member includes a second polarizing element which is disposed 90° orthogonal to a polarization axis of the first polarizing element.

Abstract: A lighting device includes a main body including a belt-shaped portion mounted along a circumferential direction of a head of a wearer, a storage case provided in the main body and positioned in a forehead region of the wearer when the lighting device is mounted on the wearer, and a light source unit that is incorporated in the storage case and includes a light emitting diode (LED) substrate on which a plurality of LED light sources is mounted. The light source unit includes a condensing lens for condensing light emitted from the plurality of LED light sources, a reflecting mirror for deflecting light emitted from the condensing lens and reflecting the light toward an affected part of a patient, and a radiator plate that radiates heat generated from the LED substrate and extends from a forehead region toward a parietal region of the wearer.

Abstract: A lighting device includes a main body including a belt-shaped portion mounted along a circumferential direction of a head of a wearer, a storage case provided in the main body and positioned in a forehead region of the wearer when the lighting device is mounted on the wearer, and a light source unit that is incorporated in the storage case and includes a light emitting diode (LED) substrate on which a plurality of LED light sources is mounted. The light source unit includes a condensing lens for condensing light emitted from the plurality of LED light sources, a reflecting mirror for deflecting light emitted from the condensing lens and reflecting the light toward an affected part of a patient, and a radiator plate that radiates heat generated from the LED substrate and extends from a forehead region toward a parietal region of the wearer.

Abstract: By providing a surface light source that planarly emits first illuminating light FL in the blue wavelength region of 400 to 500 nm and second illuminating light SL in the red wavelength region of 600 to 660 nm, and by emitting illuminating light in these specific wavelength region, it makes it possible to visually identify the position of veins easily.

Abstract: In a telephone answering machine, when the calling party information reception unit receives calling party information, and the call detection circuit detects a receiving signal, the main control unit makes the line interface capture the communication line and generate a communication path to the calling party telephone. The main control unit then determines whether the memory has the same calling party information that has been received by the calling party information reception unit. When it has been judged in the negative, the main control unit makes the response message output unit output the first response message. When it has been judged in the affirmative, the main control unit makes the response message output unit output the second response message. Under the direction of the main control unit, the response message output unit outputs the first response message or the second response message to the calling party telephone through the communication path which is generated by the line interface 2.

Abstract: An automatic focus position adjusting unit for use in a shadowless lighting device for medical purposes includes a sensor, a start switch, a start processor, and a direction adjuster. The unit also includes a focus mover, a peak detector, and an adjustment completion unit. The shadowless lighting device for medical purposes has a housing, illuminating bulbs arranged in the housing, and a drive system for inclining the illuminating bulbs so that the optical axes of the illuminating bulbs may converge, and form a focus, on a predetermined position along a focus moving axis. The automatic focus position adjusting unit permits, with a simple operation, an accurate focus position adjustment at a desired position. This is because it is possible to move the focus to a position at which the amount of light, reflected from the predetermined region at the center of the range of light, becomes a maximum.

Abstract: A shadowless lighting equipment for medical use includes an illuminating device for emitting a wave beam such as an infrared ray beam subjected to frequency modulation on a patient on an operating table so as to form an irradiation area thereon, an image forming device which forms an image of the irradiation area in accordance with a wave beam reflected from the irradiated portion of the patient, and a sensor for comparing information regarding an image forming position by the image forming device with information regarding a light concentration position of a lighting device. In this comparison, when the image forming position is spaced apart from the light concentration position, an output containing information regarding the positional difference between the positions is provided, and, in response to such an output, the lighting device is driven in the X axis, Y axis, and perpendicular directions of a coordinate surface so that the light concentration position becomes the same as the image forming position.