Abstract: Discloses are liquid crystal medium based on a mixture of polar compounds, the use thereof for electro-optical purposes, and displays containing the medium.

Abstract: Disclosed is a slit lamp microscope capable of forming a slit superior in terms of parallelism. The slit lamp microscope includes casings (100L and 100R) to the bottoms surfaces of which slit blades (107L) and (107R) are fixed and which are connected together so as to be rotatable around shaft members (102), and an inter-casing distance varying member (87) adapted to change the distance between the casings (100L and 100R) in correspondence with vertical movement of an ascent/descent shaft (86). Coil-like portions of torsion springs (103) are wound around the shaft members (102) to which the casings (100L and 100R) are connected. The torsion springs (103) urge the casings (100L and 100R) so as to bring the slit blades (107L and 107R) close to each other. Further, the casings (100L and 100R) are equipped with U-shaped springs (106) urging protrusions (100L? and 100R?) thereof so as to press them against the shaft members (102).

Abstract: An opthalmologic photographing apparatus which is used to observe and photograph a fundus oculi of an eye to be examined, includes an observation light source illuminating the eye to observe the fundus oculi of the eye, a photographing light source illuminating the eye to photograph an image of the fundus oculi of the eye, an aperture through which light illuminated from either the observation light source or the photographing light source and reflected on the fundus oculi of the eye is observed or photographed, and a control device which is configured to control an opening area of the aperture. The control device sets the opening area of the aperture to an opened observing opening area when observing the fundus oculi, and to a narrowed photographing opening area when photographing the image of the fundus oculi.

Abstract: Liquid crystal (LC) media based on a mixture of polar compounds having negative dielectric anisotropy, their use in electro-optical displays, especially those having active matrix addressing based on the ECB (electrically controlled birefringence) or VA (vertically aligned) mode or similar modes, and LC displays of these types, are described.

Abstract: Liquid crystal media based on a mixture of polar compounds of formulae I-VIII, their use for electro-optical purposes, and displays containing this medium, are described.

Abstract: Disclosed are a liquid crystal medium having a birefringence at 20° C. that is lower than 0.08 and contains 1-30% by weight of one or more compounds of formula IA, 1-10% by weight of one or more compounds of formula IB, 0-9% by weight of one or more compounds of formula IC, and the use of the medium for electro-optical purposes, and to displays containing the medium.

Abstract: An ophthalmologic photographing apparatus including: an apparatus main body having an illumination system for illuminating an eye to be examined and an observation system for observing an image of the eye to be examined which is illuminated by the illumination system; a photographing device for taking a light flux from the eye to be examined from an optical path of the observation system, photographing the image of the eye to be examined and recording the image; a storage unit for storing a photographing condition related to the apparatus main body and a photographing processing condition related to the photographing device for each of plural kinds of photographing processing modes in photographing and storing the eye to be examined; a designating unit for designating a photographing processing mode for the eye to be examined; and a setting unit for reading out a photographing condition related to the apparatus main body and a photographing processing condition related to the photographing device for a corres

Abstract: Liquid crystal (LC) media based on a mixture of polar compounds having negative dielectric anisotropy, their use in electro-optical displays, especially those having active matrix addressing based on the ECB (electrically controlled birefringence) or VA (vertically aligned) mode or similar modes, and LC displays of these types, are described.

Abstract: Liquid crystal media based on a mixture of polar compounds of formulae I-VIII, their use for electro-optical purposes, and displays containing this medium, are described.

Abstract: Disclosed is an ophthalmologic apparatus, such as a slit lamp microscope, which is improved in terms of cable routing when an imaging apparatus is used, thereby achieving an improvement in operability for the examiner, mitigating the bother or discomfort for the subject, and realizing an improved outward appearance.

Abstract: Disclosed is a slit lamp microscope capable of forming a slit superior in terms of parallelism. The slit lamp microscope includes casings (100L and 100R) to the bottoms surfaces of which slit blades (107L) and (107R) are fixed and which are connected together so as to be rotatable around shaft members (102), and an inter-casing distance varying member (87) adapted to change the distance between the casings (100L and 100R) in correspondence with vertical movement of an ascent/descent shaft (86). Coil-like portions of torsion springs (103) are wound around the shaft members (102) to which the casings (100L and 100R) are connected. The torsion springs (103) urge the casings (100L and 100R) so as to bring the slit blades (107L and 107R) close to each other. Further, the casings (100L and 100R) are equipped with U-shaped springs (106) urging protrusions (100L? and 100R?) thereof so as to press them against the shaft members (102).

Abstract: A fundus camera comprising TV relay lens unit (27) and a body unit (1) which is capable of mounting plurality of TV cameras (30, 31) and (32) is provided. The body unit (1) includes photographing optical system (3) for photographing a fundus Fu to be observed. The TV relay lens unit (27) is detachably mountable on the body unit (1) and has a function to direct a fundus image forming luminous flux divided by the photographing optical system (3) to respective TV camera according to light. The TV relay lens unit (27) comprises a switching mirror (37) and a reflecting optical element (38) so as to adapt to TV cameras of a visible-fluorescent photographing/infrared-fluorescent photographing TV camera (30) which has sensitivity for both visible light and infrared light, a color photographing TV camera (31), which has sensitivity for visible light and a fundus observing TV camera (32) which has sensitivity for infrared light.

Abstract: Liquid crystalline media comprising a dielectrically positive component A, comprising compounds of formula I wherein the parameters have the meanings given herein, are suitable for use in liquid crystal displays, especially to active matrix displays and in particular IPS displays.

Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I wherein R1 and R2 are independently of each other an alkyl, alkoxy or alkenyl group with 1 to 12 C atoms, it also being possible for one or more CH2 groups in these radicals to be replaced, in each case independently of one another, by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a manner that oxygen atoms are not linked directly to one another, Z is OCH2 or CH2O, and m is 0 or 1.

Abstract: A direct gas burner type furnaces for directly heating articles 13 by combustion gas and then exhausting the combustion gas outside the furnace, controls the combustion rate of a gas burner 2 based on the furnace temperature detected by a temperature sensor 3 in the furnace, and controls the rotational speed of an exhaust fan 8 based on the combustion rate to control the exhaust rate of the combustion gas in the furnace. Accordingly, it is possible to exhaust the combustion gas from the furnace in correspondence with the introduction rate of the combustion gas into the furnace and to prevent air at a normal temperature from being sucked into the furnace.

Abstract: In the inventive controlled atmosphere furnace, an article 11 conveyed through a preheating chamber 1 prior to being brazed is quickly heated with combustion gas circulating in a closed-loop flow path through the preheating chamber to approximately 450° C. within the approximately five minutes determined in view of the deterioration degree of flux in the atmosphere and the growth of an oxide layer on the article. A gas burner 71 and a circulation fan 6 are provided in the closed-loop flow path, and the combustion rate of the gas burner and the circulation rate of the combustion gas due to the circulation fan are controlled based on the chamber temperature detected by a temperature sensor 9 in the preheating chamber.

Abstract: There is provided an ophthalmologic photographing apparatus including: an apparatus main body having an illumination system for illuminating an eye to be examined and an observation system for observing an image of the eye to be examined which is illuminated by the illumination system; a photographing device for taking a light flux from the eye to be examined from an optical path of the observation system, photographing the image of the eye to be examined and recording the image; a storage unit for storing a photographing condition related to the apparatus main body and a photographing processing condition related to the photographing device for each of plural kinds of photographing processing modes in photographing and storing the eye to be examined; a designating unit for designating a photographing processing mode to the eye to be examined; and a setting unit for reading out a photographing condition related to the apparatus main body and a photographing processing condition related to the photographing de

Abstract: Disclosed is an ophthalmologic apparatus, such as a slit lamp microscope, which is improved in terms of cable routing when an imaging apparatus is used, thereby achieving an improvement in operability for the examiner, mitigating the bother or discomfort for the subject, and realizing an improved outward appearance.

Abstract: In a manufacturing method of a heat exchanger including a core portion having a plurality of tubes and a plurality of radiation fins connected to surfaces of the tubes, and a tank portion communicating with the tubes, a preheating step, a brazing step, a gradual cooling step and a cooling step are performed in this order. In the preheating step, temperature of the tank portion having a large heat capacity is increased earlier than that of the core portion having a small heat capacity. Therefore, the temperature of the tank portion is rapidly increased, and the temperature of the core portion is obediently increased in accordance with the temperature increase of the tank portion.

Abstract: Liquid crystalline media comprising a dielectrically positive component A, comprising compounds of formula I 1