Abstract: A mask fitting level determination device includes a mask inner pressure detection unit inserted between a mask covering a mouth, nose and a face surface of a person to measure a pressure inside the mask. A circuit control unit derives information of a pressure value measured by the mask inner pressure detection unit and generates display information for the person wearing the mask. A determination display unit shows the person the display information generated by the circuit control unit. A battery unit supplies electricity to the circuit control unit and the determination display unit. A power supply switch starts and stops the supply of the electricity to the circuit control unit and the determination display unit. A start switch starts the mask inner pressure detection operation.

Abstract: Provided are eyeglasses that can be supported so as to fit each of various head shapes of wearers without any gap, are extremely excellent in preventing slippage and falling during exercise, have a good fitting feeling, and do not particularly require an adjustment operation for preventing slippage and falling. The eyeglasses include a frame, end pieces attached to both end portions of the frame, and temples attached to the back ends of the end pieces so as to be swingable in the inward and outward directions, and a temple pad protrudes from the front end of the temple. The temple pad moves inward when the temple swings outward, and the temple pad moves outward when the temple swings inward.

Abstract: A protective system for respiration, and a management method facilitates stably supplying filtered air for safety such that the equipment management or the safety management can be performed remotely. The protective equipment includes a main body that covers the face of an operator, a fan unit including an air filter and an electric fan, a detecting section, a first control section, and a first communication section. The detecting section detects a physical quantity concerning at least one of a work environment of the operator, an action state of the operator, and an operation state of the electric fan. The first control section controls the electric fan based on a detection result of the detecting section. The first communication section transmits first information indicating a detection result of the detecting section or second information concerning an operation amount on a control target of the first control section to an external device.

Abstract: Provided is a laser scattered light measuring device capable of easily confirming the safety of laser scattered light to a human body. The laser scattered light measuring device includes a light receiving unit, a calculation unit, and a display unit. The light receiving unit receives laser scattered light generated by irradiating an object with laser light and detects intensity of the laser scattered light. The calculation unit compares the intensity of the laser scattered light received by the light receiving unit with a predetermined threshold value and calculates a degree of risk of the laser scattered light to a human body based on a comparison result. The display unit displays the degree of risk calculated by the calculation unit.

Abstract: Provided is a mask fitting level determination device that has a significantly simple component configuration, that can be driven by a battery, that can be reduced in size to a palm size, that is inexpensive, that is operated by a simple operation method, and that does not require proficiency for accurate measurement. The mask fitting level determination device includes: a mask inner pressure detection unit 2 that is inserted between a face surface F of a mask wearing person and a worn mask 1; and a circuit control unit that sets a predefined threshold value in accordance with strength of breathing of the mask wearing person and determines a fitting level on the basis of a reference pressure value and a mask inner pressure value measure by the mask inner pressure detection unit 2; and a display unit 3 that displays the fitting level determined by the circuit control unit to the mask wearing person.

Abstract: A holding tool is capable of performing positioning and reliable attachment by simple insertion operation when attaching a wearable device, and is capable of performing reliable detachment by simple operation when the device is detached. When a body part of a wearable device is inserted into a holding frame body, a projected engagement part of an elastic pressing body provided in the holding frame body is engaged with an upper surface and/or a lower surface of the body part. Engagement between the upper surface and/or the lower surface of the body part and the projected engagement part of the elastic pressing body is released by operating an operation part of the elastic pressing body upward and/or downward, to allow the wearable device to be pulled out of the holding frame body.

Abstract: Provided are eyeglasses that can be supported so as to fit each of various head shapes of wearers without any gap, are extremely excellent in preventing slippage and falling during exercise, have a good fitting feeling, and do not particularly require an adjustment operation for preventing slippage and falling. The eyeglasses include a frame, end pieces attached to both end portions of the frame, and temples attached to the back ends of the end pieces so as to be swingable in the inward and outward directions, and a temple pad protrudes from the front end of the temple. The temple pad moves inward when the temple swings outward, and the temple pad moves outward when the temple swings inward.

Abstract: A mask fitting level determination device includes a mask inner pressure detection unit inserted between a mask covering a mouth, nose and a face surface of a person to measure a pressure inside the mask. A circuit control unit derives information of a pressure value measured by the mask inner pressure detection unit and generates display information for the person wearing the mask. A determination display unit shows the person the display information generated by the circuit control unit. A battery unit supplies electricity to the circuit control unit and the determination display unit. A power supply switch starts and stops the supply of the electricity to the circuit control unit and the determination display unit. A start switch starts the mask inner pressure detection operation.

Abstract: A holding tool is capable of performing positioning and reliable attachment by simple insertion operation when attaching a wearable device, and is capable of performing reliable detachment by simple operation when the device is detached. When a body part of a wearable device is inserted into a holding frame body, a projected engagement part of an elastic pressing body provided in the holding frame body is engaged with an upper surface and/or a lower surface of the body part. Engagement between the upper surface and/or the lower surface of the body part and the projected engagement part of the elastic pressing body is released by operating an operation part of the elastic pressing body upward and/or downward, to allow the wearable device to be pulled out of the holding frame body.

Abstract: Provided is a mask fitting level determination device that has a significantly simple component configuration, that can be driven by a battery, that can be reduced in size to a palm size, that is inexpensive, that is operated by a simple operation method, and that does not require proficiency for accurate measurement. The mask fitting level determination device includes: a mask inner pressure detection unit 2 that is inserted between a face surface F of a mask wearing person and a worn mask 1; and a circuit control unit that sets a predefined threshold value in accordance with strength of breathing of the mask wearing person and determines a fitting level on the basis of a reference pressure value and a mask inner pressure value measure by the mask inner pressure detection unit 2; and a display unit 3 that displays the fitting level determined by the circuit control unit to the mask wearing person.

Abstract: An object of the present invention is to improve uneven coloring by polarization color due to birefringence of a polarization optical article. Disclosed is a polarization optical article in which uneven coloring by polarization color has been improved, the polarization optical article being a multi-layered polarization optical article including at least a linear polarization functional portion, a retardation functional portion and a back-up resin portion, characterized in that the linear polarization functional portion, the retardation functional portion and the back-up resin portion are arranged in order from an objective side toward an ocular side. The linear polarization functional portion is, for example, a linear polarizer, the retardation functional portion is, for example, a retardation sheet, and the retardation functional portion has, for example, a retardation of 1,000 nm or more. The back-up resin is a polycarbonate resin, a polyamide resin or the like.

Abstract: A belt length adjuster includes a frame body with two outer frames and two connecting frames, and a support frame provided between the two outer frames and stretching to and between the two connecting frames. The support frame supports one end part of the belt member to be used with the belt length adjuster. Two inner frames are respectively provided between the support frame and the respective outer frames and stretching to and between the two connecting frames. The support frame and the respective inner frames provide first insertion spaces into which the one end part of the belt member is inserted, while the respective inner frames and the respective outer frames provide second insertion spaces into which the other side of the belt member is inserted. Furthermore the one end part of the belt member is easily attached to the frame body.

Abstract: In a synthetic resin lens, a thermoplastic resin is caused to contain a blue pigment having the lowest value for light transmittance in 570-610 nm, and a pink pigment that, among blue light of 380-500 nm, has the highest value for light transmittance in 400-440 nm and the lowest value for light transmittance in 480-520 nm, resulting in a transparent achromatic lens having a lowest value for light transmittance in 570-610 nm. As a result, provided is a synthetic resin lens that, when used in sunglasses, corrective glasses, shields, or the like, has favorable contrast (visibility), few marked color changes when installed, and a natural color.

Abstract: A fog-resistant structure and a protective device for eyes is configured such that a transparent conductive film is formed on one surface of a lens or shield, a linear electrode is provided on upper and lower portions of the surface of the lens or shield so that each of a central region and opposite side regions of the lens or shield has substantially equal spacing between the upper and lower linear electrodes. Thus each region of the lens or shield has no difference in temperature without regulating power supplied to the transparent conductive film, thereby eliminating wasted power consumption and allowing even a structure using a battery as the power supply to have much longer available time.

Abstract: Goggles include a frame, a lens and a pair of left and right belt arms. On the frame a first stop hole is provided each left and right of a middle of each of an upper frame and a lower frame of the frame. The lens has an upper side and a lower side each of which is provided with a second stop hole at a position corresponding to each first stop hole in the frame. Each of the pair of left and right belt arms has bifurcated portions, and each end of the bifurcated portions is provided with a lock mechanism. The frame and the lens are placed on each other and the respective first and second stop holes are aligned. By the mechanisms of the belt arms, the first and second stop holes are brought into either a lock state to secure the frame, the lens and the pair of left and right belt arms, or an unlock state where the lock state is released to separate them.

Abstract: An object of the present invention is to provide single-lens type polarizing glasses which are optically sufficient in performance, and are rich in variety from a view point of design. Both of a polarizer of a right eye lens and a polarizer of a left eye lens can be two independent polarizing plates, both sides of which are protected with protective sheets, respective polarizing plates are bending-processed into a spherical, nonspherical or toric shape, and a backup resin is thermally adhered on the protective sheet on a concave side of the bending-processed polarizing plate to make a single-lens type polarizing lens, which is further prepared into single-lens type polarizing glasses.

Abstract: The present invention provides a process for producing an optical article, comprising mixing fullerene with a thermoplastic resin powder, pelletizing the mixture using a multiaxial extruder, and injection-molding the pellets, wherein the fullerene is fullerene having a carbon number of 70 or a derivative thereof, and has an average particle diameter of 5 ?m or less. An object of the present invention is to provide a process for producing a lens suitable in sunglasses or anti-glare spectacles which reduces blue hazard, and by which a blue signal can be confirmed visually, and an optical filter, and an optical article which can cut at least a part of visible light of 380 to 500 nm.