Abstract: Provided are an ophthalmic lens and a technique related thereto, the ophthalmic lens including two lens elements 1 and 2 having powers with different signs, in which when the Abbe number (e-line reference) of the lens element 1 having a power with a smaller absolute value is ve1, and the Abbe number (e-line reference) of the other lens element 2 is ve2, Formula 1 below is satisfied, and ve1<ve2??(Formula 1) when a partial dispersion ratio PgF?1 between the g-line and F?-line in the lens element 1 having the power with the smaller absolute value, and a partial dispersion ratio PgF?2 between the g-line and F?-line in the other lens element 2 are set, the following Formula 2 is satisfied.

Abstract: Provided are ophthalmic lens and a technique related thereto, the ophthalmic lens having a prescription frequency of zero or less, a diffraction structure for which a blaze wavelength is set on the short wavelength side of visible light being provided on at least one of an object-side surface side and an eyeball-side surface side, and the ophthalmic lens having positive longitudinal chromatic aberration.

Abstract: Provided is an ophthalmological lens configured to provide a near-sightedness progression suppression effect using a monochromatic aberration of a pencil that is a bundle of rays passing through the ophthalmological lens and passing through a pupil, the ophthalmological lens including a wavelength filter for attenuating light of a long wavelength longer than a set dominant wavelength, and technology related thereto.

Abstract: To provide an optical element, an optical lowpass filter, and a solid-state imaging device of which quality and capability are hard to deteriorate even if they are continually subject to both of a high-temperature, high-humid environment and a normal environment. An optical lowpass filter includes a first birefringent plate, an IR-cut glass, a ¼ retardation film, a second birefringent plate, and a pressure sensitive adhesive as a bonding layer bonding these members. The pressure sensitive adhesive primarily contains a pressure sensitive adhesive main agent polymer composed of a monomer including many hydrophilic groups so as to enhance permeableness of water within the pressure sensitive adhesive. In addition, by selecting a mixing weight ratio of the pressure sensitive adhesive main agent polymer, the permeableness can be further enhanced.

Abstract: An optical low pass filter includes: a plurality of optical elements formed by bonding together and an adhesion layer of adhesive that is installed at each of interfaces of the plurality of optical elements to be bonded. The transmitted wave aberration is ±1.5? or less (? representing incident wavelength).

Abstract: It was discovered that cells expressing brain-localizing polypeptides on the cell surface can pass through the blood-brain barrier and therefore have the activity of translocating to the brain. By introducing desired substances into such brain-localizing cells, the substances can also be translocated to the brain. For example, by intravenously administering brain-localizing cells into which pharmaceutical agents having therapeutic effects on brain diseases have been introduced, such agents can be efficiently delivered into the brain and the brain diseases can be effectively treated.

Abstract: [Problem to be solved] To provide an optical element, an optical lowpass filter, and a solid-state imaging device of which quality and capability are hard to deteriorate even if they are continually subject to both of a high-temperature high-humid environment and a normal environment. [Means to solve the problem] An optical lowpass filter includes a first birefringent plate, an IR-cut glass, a ¼ retardation film, a second birefringent plate, and a pressure sensitive adhesive as a bonding layer bonding these members. The pressure sensitive adhesive primarily contains a pressure sensitive adhesive main agent polymer composed of a monomer including many hydrophilic groups so as to enhance permeableness of water within the pressure sensitive adhesive. In addition, by selecting a mixing weight ratio of the pressure sensitive adhesive main agent polymer, the permeableness can be further enhanced.

Abstract: A drive apparatus improves drive efficiency while reducing device size, and a lens unit and a camera using the drive apparatus. A cam member is driven rotationally by vibration of an oscillator in the lens unit and thereby causes lenses to move forward and backward. The construction and operation of the drive apparatus supplants the need for a complicated drive mechanism using an electromagnetic motor and incumbent gears or cam rings. The simplified drive apparatus enables the device in which it is embodied to be made compact. Driving the lenses by means of a cam member minimizes energy loss due to friction, and thus sufficiently improves drive efficiency.

Abstract: An optical low pass filter includes: a plurality of optical elements formed by bonding together and an adhesion layer of adhesive that is installed at each of interfaces of the plurality of optical elements to be bonded. The transmitted wave aberration is ±1.5 ? or less (? representing incident wavelength).

Abstract: There is provided a liquid crystal projector capable of enhancing heat radiation of light modulating means including a liquid crystal light valve, preventing dust or the like from being attached to the surface of the liquid crystal light valve, and making black matrixes formed between pixels in the liquid crystal light valve invisible. The liquid crystal projector includes a light source unit, colored-ray dividing means for dividing light emitted from the light source unit into three colored rays, light modulating means for serving to modulate the three colored rays on the basis of a given image signal and to emit the modulated rays which are predetermined linear polarized rays, colored-ray synthesizing means for synthesizing the modulated rays, and optical projection means for enlarging and projecting the synthesized rays synthesized by the colored-ray synthesizing means onto a screen.

Abstract: An optical part is provided on a light emission side of a light modulating device. The light modulating device includes: a pair of substrates which are opposite to each other; liquid crystal which is injected between the substrates; pixel electrodes which are arranged in a matrix on one of the pair of substrates opposite to each other; and a black matrix that includes transmissive portions which are arranged on the other substrate so as to correspond to the pixel electrodes and lattice-shaped light shielding portions, each having sides substantially orthogonal to each other, which cover portions other than the pixel electrodes.

Abstract: A drive apparatus improves drive efficiency while reducing device size, and a lens unit and a camera using the drive apparatus. A cam member is driven rotationally by vibration of an oscillator in the lens unit and thereby causes lenses to move forward and backward. The construction and operation of the drive apparatus supplants the need for a complicated drive mechanism using an electromagnetic motor and incumbent gears or cam rings. The simplified drive apparatus enables the device in which it is embodied to be made compact. Driving the lenses by means of a cam member minimizes energy loss due to friction, and thus sufficiently improves drive efficiency.

Abstract: A dielectric multilayer filter includes a light-transmissive substrate having a flat surface on at least one side with a dielectric multilayer film formed on the flat surface. The dielectric multilayer film reflects light of a particular wavelength. A resin focusing lens is on one side of the light-transmissive substrate.

Abstract: An additional aspherical surface amount is defined by a sum of the optimum amount at a distance portion and the optimum amount at a near portion on a progressive refractive surface. Assuming that the ratio is taken as &agr;:&bgr;, the additional aspherical surface amount is added to the progressive refractive surface in such a manner that &agr; and &bgr; satisfy a relationship of &agr;+&bgr;=1. With this configuration, in the case where an aspherical shape is added to a progressive power lens for correcting visual acuity for the purpose of improving the optical performance and thinning the lens, the optimum aspherical shape can be given not only to a region along a main meridian line but also to the whole of the progressive refractive surface.

Abstract: A manufacturing method of a progressive multi-focal lens which has a progressive surface area comprising a distance portion and a near portion, which have different refractive powers, and a progressive portion positioned between them in which the refractive power changes progressively. The progressive surface which reflects customized information for each individual user including at least one of the information concerning each individual user's eyes or lifestyle of the user is designed. A lens design process provides processing data for the progressive multi-focal lenses with the custom-made progressive surfaces. By so doing, it is possible to provide the most appropriate spectacle lenses for the users and, at the same time, it is possible to eliminate the process of storing lenses in a semi-finished state after being processed so that it is possible to provide lenses which are suited to users at a lower cost.

Abstract: A progressive multifocal lens used for correction of vision includes a progressive refractive surface positioned closest to the user's eye when the lens is worn by the user, and a second surface on an object side of the lens. Because the base curve of the second surface can be a constant spherical surface, it is possible to prevent variations in magnification due to shape factors. In addition, differences in magnification between a distance-vision region and a near-vision region of the progressive multifocal lens are reduced, and variations in the magnification of a progressive refractive region in the progressive multifocal lens can be suppressed. Accordingly, image jumping and warping due to differences in magnification are reduced, resulting in a comfortable visual field for the user.

Abstract: In a multifocal lens for eyeglass provided with visual field areas having different refractive powers, being a distance-vision area and a near-vision area, a multifocal lens for eyeglass (10) is provided, in which the difference of the average surface power D11 of the distance-vision area (11) of the surface (2) on the side of the object and the average surface power D12 of the near-vision area (12) is made mathematically less than the addition power Add. Furthermore, a specific addition power Add is provided by adjusting the average surface power D21 of the distance-vision area of the surface (3) on the side of the eye and the average surface power D22 of the near-vision area. It becomes possible to adjust the average surface powers D11 and D12 of the surface (2) on the side of the object such that the difference of magnification of the distance-vision area and the near-vision area becomes little.

Abstract: A progressive power lens provides a large clear vision area from a far-distance use section to a progressive section, wherein an astigmatism imbalance during vision through both eyes is eliminated, and eye movement between far and near distance use takes place smoothly. Astigmatism is distributed asymmetrically in the progressive region of the progressive power lens with respect to a meridian in such manner that a larger astigmatism occurs in a nose-side region than in an ear-side region. By so doing, distribution of astigmatism in the nose-side progressive region is eased to match that of the ear-side progressive region. Moreover, by making the increasing ratio .beta. of the astigmatism in the far-near direction milder than the increasing ratio .alpha. of the astigmatism in the left-right direction, a large clear vision area is obtained and the astigmatism imbalance during vision with both eyes is eliminated. Moreover, eye movement between the far-distance use and near-distance use takes place smoothly.

Abstract: A variable focus type eyesight correcting apparatus in which a plurality of optical lenses are superimposed on each other and in which a refracting power is changed by relatively sliding the lenses in the direction of the superimposed surfaces, achieves a reduction of astigmatism, assurance of uniform refracting power, prevention of diffused reflection, which could be caused if a plurality of refractive surfaces are present, and miniaturization of lens system. When a change of astigmatism in each constituent lens in the variable focus type eyesight correcting apparatus is expressed by contours spaced at intervals of arbitrary diopter, the contours are arranged to be substantially linear and parallel to the principal meridian. The astigmatism becomes absent and the refracting power becomes constant in the region where the eyeglass lenses of the present invention are superimposed on each other, whereby the lenses of the invention can have the optical performance identical to that of single focal lens.