Abstract: A cognitive function evaluation device includes: an obtainment unit that obtains utterance data indicating a voice of an evaluatee uttering a sentence as instructed; a calculation unit that calculates, from the utterance data obtained by the obtainment unit, a feature based on the utterance data; an evaluation unit that compares the feature calculated by the calculation unit to reference data indicating a relationship between voice data indicating a voice of a person and a cognitive function of the person to evaluate the cognitive function of the evaluatee; and an output unit that outputs the sentence to be uttered by the evaluatee and outputs a result of evaluation by the evaluation unit.

Abstract: A cognitive function evaluation device includes: an instruction unit that instructs quick pronunciation of pseudoword in which a predetermined syllable is repeated; an obtainment unit that obtains voice data indicating a voice of an evaluatee who has received an instruction; a calculation unit that calculates a feature from the voice data obtained by the obtainment unit; an evaluation unit that evaluates a cognitive function of the evaluatee from the feature calculated by the calculation unit; and an output unit that outputs a result of the evaluation by the evaluation unit.

Abstract: A cognitive function evaluation device includes: an obtainment unit that obtains utterance data indicating a voice of an evaluatee uttering a sentence as instructed; a calculation unit that calculates, from the utterance data obtained by the obtainment unit, a feature based on the utterance data; an evaluation unit that compares the feature calculated by the calculation unit to reference data indicating a relationship between voice data indicating a voice of a person and a cognitive function of the person to evaluate the cognitive function of the evaluatee; and an output unit that outputs the sentence to be uttered by the evaluatee and outputs a result of evaluation by the evaluation unit.

Abstract: A cognitive function evaluation device includes an acquirer that acquires speech data that indicates speech uttered by an evaluatee in response to a task given to the evaluatee; an evaluator that evaluates a cognitive function of the evaluatee by performing a first evaluation based on a proportion of speaking time of the evaluatee in a predetermined period in the speech data acquired by the acquirer and a second evaluation based on a fundamental frequency in the speech data acquired by the acquirer; and an outputter that outputs an evaluation result obtained from the evaluation performed by the evaluator.

Abstract: A cognitive function evaluation device includes: an instruction unit that instructs quick pronunciation of pseudoword in which a predetermined syllable is repeated; an obtainment unit that obtains voice data indicating a voice of an evaluatee who has received an instruction; a calculation unit that calculates a feature from the voice data obtained by the obtainment unit; an evaluation unit that evaluates a cognitive function of the evaluatee from the feature calculated by the calculation unit; and an output unit that outputs a result of the evaluation by the evaluation unit.

Abstract: Object: To provide a rigid light reflective sheet with excellent light reflecting characteristics, ultraviolet yellowing resistance and dimensional stability. Means to solve: A light reflective sheet wherein the void containing light reflective layer (B) is laid on the light receiving side of a substrate layer (A) composed of a thermoplastic resin composition (a1) containing an inert particle of 5 to 40% in weight, the backing layer (C) is laid on the non-light receiving side of the substrate layer (A), and the void containing light reflective layer (B) is a uniaxially or biaxially stretched sheet with a thickness (tb) of 10 to 90 ?m and diffuse reflectance of 70 to 90%.

Abstract: An optical imaging system is provided that includes a rod lens array and has the optimum refractive index distribution for achieving a high resolving power. The refractive index distribution of rod lenses can be expressed by n(r)2=n02·{1?(g·r)2+h4·(g·r)4+h619 (g·r)6+h8·(g·r)8}Eq. 45 where r is a radial distance from the optical axis of the rod lenses, n0 is a refractive index on the optical axis of the rod lenses, and g, h4, h6 and h8 are refractive index distribution coefficients. The refractive index distribution coefficients h4, h6 and h8 are set on a spheroid in a Cartesian coordinate system with h4 being x-axis, h6 being y-axis and h8 being z-axis. The spheroid is defined by a vector X* that is expressed by X*=(x, y, z)=O*+kAA*+kBB*+kCC*Eq.

Abstract: An optical write-in head for obtaining a clear image even in printing at a relatively high recording density without generating strip-like irregularities in most cases. The optical write-in head applies light carrying image information to a photosensitive substance. The optical write-in head includes an array light source having a plurality of dot light sources, each of which selectively emits the light corresponding to the image information, and a lens array facing the array light source. The lens array has a plurality of lens elements which corresponds to the plurality of dot light sources respectively. An angular aperture ? of each of the lens elements is set in a range of about 14° to 18°.

Abstract: An image transfer device having: a lens array laminate 14 forming an erecting unit magnification optical system, the lens array laminate including a plurality of lens array sheets 12 of the same specification each of which has convex-convex lens elements 10 arranged in a plurality of rows and which are substantially closely laminated in a direction of each lens optical axis. Typically, two to four lens array sheets of the same specification each of which has convex-convex lens elements each having are fractive index of not lower than 1.45 and arranged in 3 to 9 rows are closely laminated on each other or one another in a direction of each lens optical axis. Each of the lens array sheets is preferably formed so that the lens thickness is in a range of from about 4 mm to about 0.5 mm and the number of lens rows is in a range of from 4 to 6.

Abstract: A light source-optical fiber coupler using a gradient index rod lens 12 by which a diffused luminous flux emitted from a light source (for example, a semiconductor laser 10) is coupled onto an end surface of an optical fiber (for example, a single-mode optical fiber 14). The gradient index rod lens has a planar end surface facing the light source, and a convex spherical end surface facing the optical fiber. The gradient index rod lens has a light source side numerical aperture NA2 in a range of from 0.40 to 0.75, an effective lens radius r0 in a range of from 0.3 to 1.0 mm, and a spherical curvature radius R1 in a range of from 1.2 to 2.0 mm.

Abstract: An image transfer device having: a lens array laminate 14 forming an erecting unit magnification optical system, the lens array laminate including a plurality of lens array sheets 12 of the same specification each of which has convex-convex lens elements 10 arranged in a plurality of rows and which are substantially closely laminated in a direction of each lens optical axis. Typically, two to four lens array sheets of the same specification each of which has convex-convex lens elements each having are fractive index of not lower than 1.45 and arranged in 3 to 9 rows are closely laminated on each other or one another in a direction of each lens optical axis. Each of the lens array sheets is preferably formed so that the lens thickness is in a range of from about 4 mm to about 0.5 mm and the number of lens rows is in a range of from 4 to 6. (FIG.

Abstract: A rod lens array for line scanning is provided that can reduce the degradation of image quality (i.e., vertical stripes (streaks) in the sub-scanning direction of an output image) caused by a periodic irregularity in the light quantity, considering an angular aperture and the positional deviation of an image line in the sub-scanning direction. A rod lens array for one-to-one imaging is used as the rod lens array for line scanning, including a plurality of columnar rod lenses having a refractive index distribution in the radial direction that are arranged in one row in the main scanning direction with their optical axes in parallel. The effective overlapping degree m is in the range defined by (1.55+0.5j)D/d≦m≦(1.80+0.5j)D/d  Eq. 37 where d is the lens diameter of the rod lens and D is the array pitch of the rod lenses.

Abstract: In an image forming apparatus, an object surface (14) is disposed facing one end face of a rod lens array (10), while an image surface (16) is disposed facing the other end face thereof. A lens working distance of the rod lens array on the object side is substantially equal to that on the image side. An actual object-image distance Tco is set between the conjugate length TC1 at which the average value MTFave of the MTF of the rod lens array in the lens array direction is maximized and the conjugate length TC2 at which the &Dgr;MTF(=(MTFmax−MTFmin)/MTFave) is minimized, and a shift quantity &Dgr;TC(=|TCo−TC1|) is set within 0 mm<&Dgr;TC<+02 mm for the conjugate length TC1 at which the MTFave is maximized.

Abstract: An optical write-in head for obtaining a clear image even in printing at a relatively high recording density without generating strip-like irregularities in most cases. The optical write-in head applies light carrying image information to a photosensitive substance. The optical write-in head includes an array light source having a plurality of dot light sources, each of which selectively emits the light corresponding to the image information, and a lens array facing the array light source. The lens array has a plurality of lens elements which corresponds to the plurality of dot light sources respectively. An angular aperture &thgr; of each of the lens elements is set in a range of about 14° to 18°.

Abstract: An imaging optical element is comprised of a gradient index rod lens 12 of which external peripheral surface is a smooth surface without being processed by means of a flare-cut treatment and a field limitation stop member 14 mounted on the lens surface at the incidence side thereof. As for the stop member, the length t thereof is: t>1o·D/2X (where, 1o: a lens working distance, D: a rod lens diameter, X: a radius of field of view), whereby the angle of incidence of beam &thgr; at the center of the lens satisfies &thgr;<tan−1(X/1o) . It is effective especially when an application thereof is made to a rod lens array comprised of a plurality of rod lenses arranged into an array.

Abstract: An imaging optical apparatus comprising a gradient-index rod lens array and two transparent or light transmitting optical elements that are substantially identical in shape and imaging characteristics and which are provided in the object space and the image space in the optical path of said gradient-index rod lens array in such a way that they are symmetrical with respect to said gradient-index rod lens array.

Abstract: An optical imaging system is provided that includes a rod lens array and has the optimum refractive index distribution for achieving a high resolving power.

Abstract: A light source-optical fiber coupler using a gradient index rod lens 12 by which a diffused luminous flux emitted from a light source (for example, a semiconductor laser 10) is coupled onto an end surface of an optical fiber (for example, a single-mode optical fiber 14) . The gradient index rod lens has a planar end surface facing the light source, and a convex spherical end surface facing the optical fiber. The gradient index rod lens has a light source side numerical aperture NA2 in a range of from 0.40 to 0.75, an effective lens radius r0 in a range of from 0.3 to 1.0 mm, and a spherical curvature radius P1 in a range of from 1.2 to 2.0 mm.

Abstract: A rod lens array for line scanning is provided that can reduce the degradation of image quality (i.e., vertical stripes (streaks) in the sub-scanning direction of an output image) caused by a periodic irregularity in the light quantity, considering an angular aperture and the positional deviation of an image line in the sub-scanning direction. A rod lens array for one-to-one imaging is used as the rod lens array for line scanning, including a plurality of columnar rod lenses having a refractive index distribution in the radial direction that are arranged in one row in the main scanning direction with their optical axes in parallel.

Abstract: In an image forming apparatus, an object surface (14) is disposed facing one end face of a rod lens array (10), while an image surface (16) is disposed facing the other end face thereof. A lens working distance of the rod lens array on the object side is substantially equal to that on the image side. An actual object-image distance Tco is set between the conjugate length TC1 at which the average value MTFave of the MTF of the rod lens array in the lens array direction is maximized and the conjugate length TC2 at which the &Dgr;MTF(=(MTFmax−MTFmin)/MTFave) is minimized, and a shift quantity &Dgr;TC(=|TCo−TC1|) is set within 0 mm<&Dgr;TC<+02 mm for the conjugate length TC1 at which the MTFave is maximized.