Abstract: A projector projects image light generated by an image generation unit, as an enlarged image via a projection system. The incident position of the image light on the projection system is moved by a lens shift mechanism. The projection system forms an intermediate image in the course of the optical path. A light-shielding mask is provided at an image forming position of the intermediate image. A light-shielding area by the light-shielding mask includes an area that does not overlap the intermediate image within a range of an effective image forming area at the image forming position of the intermediate image. For example, the light-shielding area is an area on the side opposite to the side to which the intermediate image is shifted, of the effective image forming area.

Abstract: A projection lens includes a plurality of lens groups each formed of at least one lens, and a lens barrel adapted to support each of the lens groups from an outer circumferential side. The lens barrel includes a first temporarily holding mechanism allowing the first lens group located at an end on a enlargement side to be displaced in a direction perpendicular to the optical axis, a first adhesive applied to the first temporarily holding mechanism to fix the first lens group so as to be unable to be displaced, a second temporarily holding mechanism allowing the seventh lens group located at an end on a reduction side to be displaced in a direction perpendicular to the optical axis, and a second adhesive applied to the second temporarily holding mechanism to fix the seventh lens group so as to be unable to be displaced.

Abstract: A projector projects image light generated by an image generation unit, as an enlarged image via a projection system. The incident position of the image light on the projection system is moved by a lens shift mechanism. The projection system forms an intermediate image in the course of the optical path. A light-shielding mask is provided at an image forming position of the intermediate image. A light-shielding area by the light-shielding mask includes an area that does not overlap the intermediate image within a range of an effective image forming area at the image forming position of the intermediate image. For example, the light-shielding area is an area on the side opposite to the side to which the intermediate image is shifted, of the circular effective image forming area.

Abstract: A projector includes a light source, a light modulator that has an image drawing region where an image is drawable and modulates light emitted from the light source by using an image drawn in the image drawing region, and a projection system that includes a projection lens and projects image light modulated by the light modulator. The projector further includes a lens shift mechanism that moves the projection lens and a control section that controls the image drawing performed by the light modulator, and the control section provides, based on the position of the projection lens, the image drawing region of the light modulator with a suppression region where the amount of the image light is suppressed.

Abstract: A projection lens includes a plurality of lens groups each formed of at least one lens, and a lens barrel adapted to support each of the lens groups from an outer circumferential side. The lens barrel includes a first temporarily holding mechanism allowing the first lens group located at an end on a enlargement side to be displaced in a direction perpendicular to the optical axis, a first adhesive applied to the first temporarily holding mechanism to fix the first lens group so as to be unable to be displaced, a second temporarily holding mechanism allowing the seventh lens group located at an end on a reduction side to be displaced in a direction perpendicular to the optical axis, and a second adhesive applied to the second temporarily holding mechanism to fix the seventh lens group so as to be unable to be displaced.

Abstract: A projector includes a light source, a light modulator that has an image drawing region where an image is drawable and modulates light emitted from the light source by using an image drawn in the image drawing region, and a projection system that includes a projection lens and projects image light modulated by the light modulator. The projector further includes a lens shift mechanism that moves the projection lens and a control section that controls the image drawing performed by the light modulator, and the control section provides, based on the position of the projection lens, the image drawing region of the light modulator with a suppression region where the amount of the image light is suppressed.

Abstract: There is provided a progressive addition lens for spectacles including a distance portion and a near portion having different powers, wherein an equivalent spherical power of the distance portion is plus; and a first lens and a second lens having different addition powers from each other, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the first lens, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the second lens are the same.

Abstract: An optical lens including, an object-side surface including an atoric surface element and an eyeball-side surface including an element that cancels a surface power shift produced by the atoric surface element, wherein the atoric surface element causes horizontal surface power at a fitting point to be greater than vertical surface power at the fitting point and causes a difference between the horizontal surface power and the vertical surface power to decrease along a horizontal reference line passing through the fitting point in a direction from the fitting point toward a periphery of the optical lens or causes a sign of the difference between the horizontal surface power and the vertical surface power to change along the horizontal reference line.

Abstract: A method of designing a progressive power lens with less image sway includes preferentially selecting a spectacle specification including a first condition if an average prescription power of a distance portion is equal to or greater than +3.0 D, and preferentially selecting a spectacle specification including a second condition if the average prescription power is equal to or smaller than ?3.0 D. At least a surface power OHPf in a horizontal direction of a distance portion on an object-side surface is greater than a surface power OVPf in a vertical direction, or a surface power OHPn in a horizontal direction of a near portion is greater than a surface power OVPn in a vertical direction. The first condition includes a condition that the OVPf is greater than the OVPn, and the second condition includes a condition that the OVPf is smaller than the OVPn.

Abstract: A progressive-lens designing system includes a manufacturer-side terminal installed in a lens manufacturer connected to a shop-side terminal installed in a spectacle shop or any other location via a network. The manufacturer-side terminal includes an optimization coefficient setting section that uses a variety of data received from the shop-side terminal to set an optimization coefficient for each target object in specific work, a dioptric power computing section that computes target dioptric power for each target object, a lens designing section that performs lens design, and an order processing section that performs order processing when receiving an order placed from the shop-side terminal.

Abstract: A progressive power lens 10 for spectacles has a distance portion 11 and a near portion 12 of different powers. A surface power OMHP in a horizontal direction on an object-side surface along a principal meridian 14 or a vertical reference line passing through a fitting point Pe, a surface power OMVP(y) in a vertical direction of the object-side surface, the absolute value IMHP of a surface power on an eye-side surface, and the absolute value IMVP of a surface power in a vertical direction on the eye-side surface satisfy the following condition. OMHP(y)>OMVP(y) IMHP(y)>IMVP(y) OMHP(y)?OMVP(y)=IMHP(y)?IMVP(y) In the conditions, y is a coordinate along the principal meridian or the vertical reference line.

Abstract: There is provided a progressive addition lens for spectacles including a distance portion and a near portion having different powers, wherein an equivalent spherical power of the distance portion is plus; and a first lens and a second lens having different addition powers from each other, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the first lens, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the second lens are the same.

Abstract: There is provided a progressive addition lens, including: a distance portion and a near portion; an object side surface including a first toric surface element; and an eyeball side surface including a second toric surface element that cancels the first toric surface element, wherein the first toric surface element is the element in which a vertical surface power OVPf1 at a distance reference point which is previously defined in the distance portion on the object side surface, is larger than a horizontal surface power OHPf1 at the distance reference point, and OVPf1 is not less than a vertical surface power OVPn1 at a near reference point which is previously defined in the near potion on the object side surface.

Abstract: A progressive power lens 10 for spectacles has a distance portion 11 and a near portion 12 of different powers. A surface power OMHP in a horizontal direction on an object-side surface along a principal meridian 14 or a vertical reference line passing through a fitting point Pe, a surface power OMVP(y) in a vertical direction of the object-side surface, the absolute value IMHP of a surface power on an eye-side surface, and the absolute value IMVP of a surface power in a vertical direction on the eye-side surface satisfy the following condition. OMHP(y)>OMVP(y) IMHP(y)>IMVP(y) OMHP(y)?OMVP(y)=IMHP(y)?IMVP(y) In the conditions, y is a coordinate along the principal meridian or the vertical reference line.

Abstract: A progressive power lens including a distance portion for visual recognition of a far working distance, a near portion for visual recognition of a near working distance, and an intermediate portion provided between the distance portion and the near portion, the intermediate portion including a position of an amount of intermediate inset in which a visual line when the intermediate working distance is visually recognized passes an eyeball side surface of the progressive power lens, and addition at intermediate position for viewing an intermediate working distance smaller than the far working distance and larger than the near working distance being set to the position of the amount of intermediate inset.

Abstract: optical lens including, an object-side surface including an atoric surface element and an eyeball-side surface including an element that cancels a surface power shift produced by the atoric surface element, wherein the atoric surface element causes horizontal surface power at a fitting point to be greater than vertical surface power at the fitting point and causes a difference between the horizontal surface power and the vertical surface power to decrease along a horizontal reference line passing through the fitting point in a direction from the fitting point toward a periphery of the optical lens or causes a sign of the difference between the horizontal surface power and the vertical surface power to change along the horizontal reference line.

Abstract: A method of designing a progressive power lens with less image sway includes preferentially selecting a spectacle specification including a first condition if an average prescription power of a distance portion is equal to or greater than +3.0 D, and preferentially selecting a spectacle specification including a second condition if the average prescription power is equal to or smaller than ?3.0 D. At least a surface power OHPf in a horizontal direction of a distance portion on an object-side surface is greater than a surface power OVPf in a vertical direction, or a surface power OHPn in a horizontal direction of a near portion is greater than a surface power OVPn in a vertical direction. The first condition includes a condition that the OVPf is greater than the OVPn, and the second condition includes a condition that the OVPf is smaller than the OVPn.

Abstract: A progressive power lens including a distance portion for visual recognition of a far working distance, a near portion for visual recognition of a near working distance, and an intermediate portion provided between the distance portion and the near portion, the intermediate portion including a position of an amount of intermediate inset in which a visual line when the intermediate working distance is visually recognized passes an eyeball side surface of the progressive power lens, and addition at intermediate position for viewing an intermediate working distance smaller than the far working distance and larger than the near working distance being set to the position of the amount of intermediate inset.

Abstract: A progressive-lens designing system includes a manufacturer-side terminal installed in a lens manufacturer connected to a shop-side terminal installed in a spectacle shop or any other location via a network. The manufacturer-side terminal includes an optimization coefficient setting section that uses a variety of data received from the shop-side terminal to set an optimization coefficient for each target object in specific work, a dioptric power computing section that computes target dioptric power for each target object, a lens designing section that performs lens design, and an order processing section that performs order processing when receiving an order placed from the shop-side terminal.