Abstract: An optical lens sheet 3 for use in a direct type backlight device according to the invention includes a plurality of cylindrical lenses 31 arranged in the same direction as the arrangement direction of a plurality of line light sources. The cylindrical lenses 31 each have a polygonal cross section and in the cross section of the convex surface 310, the difference between the inclination angles (?1 to ?5) of two sides (S1 to S5) adjacent to each other gradually decreases from the lens center LC to the lens edge LE. When the distance between two line light sources arranged parallel to each other is 2L, and the height from the central axis of the line light source to the bottom surface of the optical lens sheet 3 is H, the inclination angle ?1 satisfies Expression (1). Therefore, the luminance ratio in the intermediate point between the line light sources arranged parallel to each other can be improved and a homogenous luminance distribution can be obtained. 1.6×arctan(L/H)>?1>1.

Abstract: The present invention relates to a lens array unit fabrication process. A lens array forming step produces a first and a second lens arrays each having linearly-arranged first or second lenses. In a lens array connecting step, the first array is connected to the second array so that the first lenses are axially aligned with the second lenses. The connecting step includes providing of ultrasonic vibration by e.g. an ultrasonic horn. In the forming step, a resin casting is used in which lens array regions, each including linearly-arranged first or second lenses, are integrally formed in a direction perpendicular to the rows of lenses. In the forming step, a multiple-blade rotary cutter, provided with rotary blades disposed at a pitch corresponding to the transverse dimension of each lens array region, is used to simultaneously make cuts flanking the lens array regions.

Abstract: A reader apparatus includes a card slot unit receiving a card on which a pattern code is attached; a LED array having a light emitting plane for emitting light of a light path width smaller than the diameter of the light emitting plane; a reflective mirror having a portion facing the card received through the card slot unit, the facing portion having a length smaller than the diameter of the light emitting plane of the LED array for reflecting light emitted from the LED array to direct the light to the pattern code of the card received through the card slot unit; and a reader device receiving light reflected from the pattern code of the card. Since the card slot depth can be made smaller than the conventional one so that the card can be inserted into the reader apparatus without hiding the information attached at the predetermined position, the user can view the information. The insert position of the card can be optimized.

Abstract: A paper detecting apparatus includes a transfer base, a first and a second linear sensors, and a data processor. The transfer base transfers a paper in a predetermined transfer direction, and the paper includes a first and a second side edges in parallel to each other. The first linear sensor includes a first linear reading region for detecting the first side edge of the paper. The second linear sensor includes a second linear reading region for detecting the second side edge of the paper. The data processor processes the data obtained by the first and the second sensors. The first and the second sensors are arranged in a manner such that the first and the second linear reading regions are positioned transversely to the transfer direction. The data processor detects the tilt angle between the paper and the transfer direction based on the positional information of the first and the second side edges obtained by the first and the second sensors.

Abstract: The present invention relates to a lens array unit fabrication process. A lens array forming step produces a first and a second lens arrays each having linearly-arranged first or second lenses. In a lens array connecting step, the first array is connected to the second array so that the first lenses are axially aligned with the second lenses. The connecting step includes providing of ultrasonic vibration by e.g. an ultrasonic horn. In the forming step, a resin casting is used in which lens array regions, each including linearly-arranged first or second lenses, are integrally formed in a direction perpendicular to the rows of lenses. In the forming step, a multiple-blade rotary cutter, provided with rotary blades disposed at a pitch corresponding to the transverse dimension of each lens array region, is used to simultaneously make cuts flanking the lens array regions.