Abstract: A display optical system includes a diffractive surface with a controlled wavelength dispersion characteristic. A predetermined inequality is satisfied.

Abstract: An optical system is configured to guide a light beam from a display surface to a pupil surface. The optical system includes, in order from a pupil surface side to a display surface side, a front group having a first lens having positive refractive power, and a rear group having a plurality of lenses. A surface closest to the pupil surface of the rear group is a first transmissive reflective surface, and a surface closest to the display surface of the rear group is a second transmissive reflective surface. A predetermined inequality is satisfied.

Abstract: An optical system is configured to guide a light beam from a display surface to a pupil surface, and includes, in order from a pupil surface side to a display surface side, a first lens having a first transmissive reflective surface on the display surface side, a second lens, and a third lens having a second transmissive reflective surface on the pupil surface side. A quarter waveplate is provided to a surface on the pupil surface side of the second lens. The second lens and the third lens are spaced apart from each other. The light beam from the display surface transmits through the third lens and the second lens in this order, is reflected by the first transmissive reflective surface toward the display surface, transmits through the second lens, and is reflected toward the pupil surface by the second transmissive reflective surface, transmits through the second lens and the first lens in this order, and enters the pupil surface.

Abstract: An optical system includes, in order from a pupil surface side to a display surface side, a first lens having a first transmissive reflective surface on the pupil surface side, a second lens, and a third lens having a second transmissive reflective surface on the display surface side. The second lens is cemented with the first or third lens. The light beam from the display surface transmits through the second transmissive reflective surface, transmits through the third, second, and first lenses in this order, is reflected by the first transmissive reflective surface, transmits through the first, second, and third lenses in this order, is reflected by the second transmissive reflective surface, transmits through the third, second, and first lenses in this order, transmits through the first transmissive reflective surface, and enters the pupil surface.

Abstract: An optical system through which light from a display surface is guided to a pupil surface includes, in order from a pupil surface side to a display surface side, a first optical system, a first transmissive reflective member having a first transmissive reflective surface that is a curved surface, a second optical system, a second transmissive reflective member having a second transmissive reflective surface that is a curved surface, and a third optical system. A lens closest to the display surface in the first optical system and a lens disposed closest to the pupil surface in the second optical system are cemented with each other via the first transmissive reflective member. A lens closest to the display surface in the second optical system and a lens disposed closest to the pupil surface in the third optical system are cemented with each other via the second transmissive reflective member.

Abstract: An LCD indicator unit contains an LCD indicator with a display portion that includes set temperature and current temperature display portions, a diffusion sheet disposed on the rear surface side of the LCD indicator, a reflective frame body disposed on the rear surface side of the diffusion sheet, a light guide plate disposed on the rear surface side of the reflective frame body such that an outer peripheral portion thereof is covered with the reflective frame body, and an LCD indicator control substrate-disposed on the rear surface side of the light guide plate, with LEDs serving as light sources for the LCD indicator mounted on a right-side outer peripheral portion on the front surface side of the LCD indicator control substrate. Light emitted from the LEDs is caused to enter a side wall surface portion of the light guide plate to irradiate the display portion of the LCD indicator.

Abstract: An LCD indicator unit contains an LCD indicator with a display portion that includes set temperature and current temperature display portions, a diffusion sheet disposed on the rear surface side of the LCD indicator, a reflective frame body disposed on the rear surface side of the diffusion sheet, a light guide plate disposed on the rear surface side of the reflective frame body such that an outer peripheral portion thereof is covered with the reflective frame body, and an LCD indicator control substrate disposed on the rear surface side of the light guide plate, with LEDs serving as light sources for the LCD indicator mounted on a right-side outer peripheral portion on the front surface side of the LCD indicator control substrate. Light emitted from the LEDs is caused to enter a side wall surface portion of the light guide plate to irradiate the display portion of the LCD indicator.

Abstract: To provide a device to reconfigure multi-level logic networks, which enable logic modification and reconfiguration of a multi-level logic network with small circuit area and low-power dissipation in a simple manner. For example, in the case of reconfiguring a multi-level logic network following logic modification for deleting an output vector F(b) of an objective logic function F(X) corresponding to an input vector b, unmodified pq elements are selected one by one from the nearest pq element EG to an output side. At this time, among output values of pq elements closer to an input side than selected pq elements, output values corresponding to the input vector, which equal an output value corresponding to any input variable X other than the input vector b are considered modified and thus not selected. Then, a selected output value corresponding to the input vector b is rewritten to an “invalid value”.

Abstract: An external dermal agent includes (a) at least one substance selected from the group consisting of a vitamin A compound and a derivative thereof; (b) at least one substance selected from the group consisting of a hinokitiol and a derivative thereof; and (c) at least one substance selected from the group consisting of an epidermal lipid and a similar component thereof. The external dermal agent corrects dry and rough skin, and promotes skin tautness and elasticity thereby reducing wrinkle formation.