Abstract: The present invention provides a recombinant PRPK protein, a recombinant TPRKB protein, or a recombinant PRPK/TPRKB complex expressed by use of a eukaryotic cell expression system. The present invention also provides a method of preparing a recombinant PRPK, a recombinant TPRKB, or a recombinant PRPK/TPRKB, comprising expressing a recombinant PRPK, a recombinant TPRKB, or a recombinant PRPK/TPRKB complex by use of a eukaryotic cell expression system. The present invention also provides a method of identifying an agent that modulates PRPK, TPRKB, or PRPK/TPRKB complex using the recombinant PRPK, the recombinant PRPK or the recombinant PRPK/TPRKB complex.

Abstract: The present invention provides a recombinant PRPK protein, a recombinant TPRKB protein, or a recombinant PRPK/TPRKB complex expressed by use of a eukaryotic cell expression system. The present invention also provides a method of preparing a recombinant PRPK, a recombinant TPRKB, or a recombinant PRPK/TPRKB, comprising expressing a recombinant PRPK, a recombinant TPRKB, or a recombinant PRPK/TPRKB complex by use of a eukaryotic cell expression system. The present invention also provides a method of identifying an agent that modulates PRPK, TPRKB, or PRPK/TPRKB complex using the recombinant PRPK, the recombinant PRPK or the recombinant PRPK/TPRKB complex.

Abstract: A light amount adjusting device is assembled in a projector having a light source and a projection device projecting light from the light source on a screen through an image forming panel. The light amount adjusting device is arranged in the projection device or between the light source and the projection device. The light amount adjusting device includes a substrate having an optical path opening so that light from the light source passes therethrough; a blade member for adjusting quantity of light passing through the optical path opening; and a driving device for opening and closing the blade member. The blade member includes a base member formed of a polyimide sheet or a polyester sheet having heat resistance withstanding heat of the light source. A light blocking material is laminated on the base member.

Abstract: A light amount-adjusting device has a base plate with an optical path aperture, first and second blade members, and a driving unit for swinging open and close the blade members. Each blade member has a base-end portion and a front-end portion. The base-end portion is pivotally held on the base plate. The front-end portion faces the aperture. First and second boss-like protrusions project from the base plate and from the surfaces of the blade members. The protrusions are coupled to define the heightwise positions of the blade members in the direction of the optical axis. The vertically overlapping blade members pivotally supported on the base plate can be swung open and closed without interfering with each other. The device produces less frictional load when the aperture is opened and closed, and thus less noise.

Abstract: A light amount-adjusting device has a base plate with an optical path aperture, first and second blade members, and a driving unit for swinging open and close the blade members. Each blade member has a base-end portion and a front-end portion. The base-end portion is pivotally held on the base plate. The front-end portion faces the aperture. First and second boss-like protrusions project from the base plate and from the surfaces of the blade members. The protrusions are coupled to define the heightwise positions of the blade members in the direction of the optical axis. The vertically overlapping blade members pivotally supported on the base plate can be swung open and closed without interfering with each other. The device produces less frictional load when the aperture is opened and closed, and thus less noise.

Abstract: A light amount adjusting device is assembled in a projector having a light source and a projection device projecting light from the light source on a screen through an image forming panel. The light amount adjusting device is arranged in the projection device or between the light source and the projection device. The light amount adjusting device includes a substrate having an optical path opening so that light from the light source passes therethrough; a blade member for adjusting quantity of light passing through the optical path opening; and a driving device for opening and closing the blade member. The blade member includes a base member formed of a polyimide sheet or a polyester sheet having heat resistance withstanding heat of the light source. A light blocking material is laminated on the base member.

Abstract: An ND filter includes a substrate formed in a plastic sheet and a deposited film formed on a surface of the substrate. The plastic sheet has at least 120° C. of a glass transition temperature. In producing the ND filter, the deposited film is formed on the surface of the substrate at a temperature below the glass transition temperature of the plastic sheet to suppress deformation due to expansion and contraction and to prevent the plastic sheet from wrinkling.

Abstract: An ND filter includes a substrate formed in a plastic sheet and a deposit film deposited on a surface of the substrate. The plastic sheet is composed of a norbornene resin and the deposit film is composed of a nickel-chromium alloy. The norbornene resin has a small thermal shrinkage factor and prevents the plastic sheet from wrinkling. The nickel-chromium alloy has a good oxidation resistance and ensures a uniform light transmittance of the deposit film over the entire visible light region.

Abstract: An ND filter includes a substrate formed in a plastic sheet and a deposit film deposited on a surface of the substrate. The plastic sheet is composed of a norbornene resin and the deposit film is composed of a nickel-chromium alloy. The norbornene resin has a small thermal shrinkage factor and prevents the plastic sheet from wrinkling. The nickel-chromium alloy has a good oxidation resistance and ensures a uniform light transmittance of the deposit film over the entire visible light region.

Abstract: An ND filter includes a substrate formed in a plastic sheet and a deposited film formed on a surface of the substrate. The plastic sheet has at least 120° C. of a glass transition temperature. In producing the ND filter, the deposited film is formed on the surface of the substrate at a temperature below the glass transition temperature of the plastic sheet to suppress deformation due to expansion and contraction and to prevent the plastic sheet from wrinkling.