Abstract: Provided are a projection apparatus and a projection method capable of uniformly projecting a projection image, in which blurring is suppressed, onto a projection target having projected and recessed portions outside the focal depth of a projection lens by using the afterimage effect. The projection apparatus includes: a light source; a projection image generation unit; a projection lens that projects a projection image generated by the projection image generation unit onto a projection target having projected and recessed portions, where a defocus optical transfer function at a specific frequency has two or more local maximum values and a second largest local maximum value is equal to or greater than 0.5 times a first largest local maximum value; an oscillation mechanism that oscillates the projection lens in a direction of an optical axis T; and a control unit that controls an amplitude and a period of the oscillation mechanism.

Abstract: An evaluation system includes an input unit that inputs a test chart image acquired by imaging a test chart including a plurality of characters, an evaluation unit that evaluates performance of an imaging unit using the test chart image, an image generation unit that generates an evaluation image representing an evaluation of the evaluation unit at each position on the test chart image with a color, and a display unit that displays the evaluation image along with the test chart image or in a superimposed manner on the test chart image.

Abstract: Provided are a projection apparatus and a projection method capable of uniformly projecting a projection image, in which blurring is suppressed, onto a projection target having projected and recessed portions outside the focal depth of a projection lens by using the afterimage effect. The projection apparatus includes: a light source; a projection image generation unit; a projection lens that projects a projection image generated by the projection image generation unit onto a projection target having projected and recessed portions, where a defocus optical transfer function at a specific frequency has two or more local maximum values and a second largest local maximum value is equal to or greater than 0.5 times a first largest local maximum value; an oscillation mechanism that oscillates the projection lens in a direction of an optical axis T; and a control unit that controls an amplitude and a period of the oscillation mechanism.

Abstract: An evaluation system includes an input unit that inputs a test chart image acquired by imaging a test chart including a plurality of characters, an evaluation unit that evaluates performance of an imaging unit using the test chart image, an image generation unit that generates an evaluation image representing an evaluation of the evaluation unit at each position on the test chart image with a color, and a display unit that displays the evaluation image along with the test chart image or in a superimposed manner on the test chart image.

Abstract: An imaging module includes an image stabilizing movable portion which has a lens group and a magnetic member, an imaging element which images a subject through the lens group, an elastic support portion which supports the image stabilizing movable portion so as to be movable in a direction perpendicular to an optical axis of the lens group and to be inclinable around an axis perpendicular to the optical axis, and a suppression portion which mechanically prevents inclination of the image stabilizing movable portion, in which the suppression portion has an extension portion which is provided in the image stabilizing movable portion and extends in an outer circumferential direction of the image stabilizing movable portion, and a guide portion which overlaps the extension portion when viewed from the direction of the optical axis, and prevents inclination of the image stabilizing movable portion by abutting the extension portion.

Abstract: An imaging lens consists of three lenses of, in order from an object side, a first lens having a biconcave shape, and an object-side surface of which is aspherical, a second lens having negative refractive power and a third lens having positive refractive power with a convex surface facing an image side. The absolute value of a curvature radius of an image-side surface of the third lens is less than the absolute value of a curvature radius of an object-side surface of the third lens.

Abstract: An imaging lens is constituted essentially by four or more lenses, including, in order from the object side to the image side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a plurality of other lenses. The conditional formulae below are satisfied. 0.8<TL/f<1.0??(1) 1.0<f/fl<3.0??(2) 2.03 mm<f<5.16 mm??(3) 1.0 mm<fl<3.0 mm??(4) wherein f is the focal length of the entire lens system, fl is the focal length of the first lens, TL is the distance along the optical axis from the surface of the first lens toward the object side to the paraxial focal point position at the image side in the case that the portion corresponding to back focus is an air converted length.

Abstract: An imaging lens consists of three lenses of, in order from an object side, a first lens having a biconcave shape, and an object-side surface of which is aspherical, a second lens having negative refractive power and a third lens having positive refractive power with a convex surface facing an image side. The absolute value of a curvature radius of an image-side surface of the third lens is less than the absolute value of a curvature radius of an object-side surface of the third lens.

Abstract: An imaging module includes an image stabilizing movable portion which has a lens group and a magnetic member, an imaging element which images a subject through the lens group, an elastic support portion which supports the image stabilizing movable portion so as to be movable in a direction perpendicular to an optical axis of the lens group and to be inclinable around an axis perpendicular to the optical axis, and a suppression portion which mechanically prevents inclination of the image stabilizing movable portion, in which the suppression portion has an extension portion which is provided in the image stabilizing movable portion and extends in an outer circumferential direction of the image stabilizing movable portion, and a guide portion which overlaps the extension portion when viewed from the direction of the optical axis, and prevents inclination of the image stabilizing movable portion by abutting the extension portion.

Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with the convex surface toward the object side; a second lens having a biconcave shape; a third lens having a positive refractive power and having a meniscus shape with the convex surface toward the image side; a fourth lens having a positive refractive power and having a convex surface toward the image side; and a fifth lens having a negative refractive power, wherein a predetermined conditional expression is satisfied.

Abstract: An imaging lens is constituted essentially by four or more lenses, including, in order from the object side to the image side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a plurality of other lenses. The conditional formulae below are satisfied. 0.8<TL/f<1.0??(1) 1.0<f/fl<3.0??(2) 2.03 mm<f<5.16 mm??(3) 1.0 mm<fl<3.0 mm??(4) wherein f is the focal length of the entire lens system, fl is the focal length of the first lens, TL is the distance along the optical axis from the surface of the first lens toward the object side to the paraxial focal point position at the image side in the case that the portion corresponding to back focus is an air converted length.

Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with a convex surface toward the object side; a second lens having a biconcave shape; a third lens having a positive refractive power and having a meniscus shape with a convex surface toward the image side; a fourth lens having a meniscus shape with a convex surface toward the image side; and a fifth lens having a negative refractive power and having a concave surface toward the object side.

Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with the convex surface toward the object side; a second lens having a biconcave shape; a third lens having a positive refractive power and having a meniscus shape with the convex surface toward the image side; a fourth lens having a positive refractive power and having a convex surface toward the image side; and a fifth lens having a negative refractive power, wherein a predetermined conditional expression is satisfied.

Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with a convex surface toward the object side; a second lens having a biconcave shape; a third lens having a positive refractive power and having a meniscus shape with a convex surface toward the image side; a fourth lens having a meniscus shape with a convex surface toward the image side; and a fifth lens having a negative refractive power and having a concave surface toward the object side.