Abstract: A joined optical member 1 includes: a hardly adhesive lens L1 that is formed of a hardly adhesive material; an easily adhesive lens L2 that is formed of a easily adhesive material and is provided parallel to the hardly adhesive lens L1 in an optical axis direction; a bonding member that includes an exposed portion 2a and is embedded in the hardly adhesive lens L1, the exposed portion 2a being exposed to an outer peripheral portion 11 of a facing surface L1a of the hardly adhesive lens L1 that faces the easily adhesive lens L2; and an adhesive 3 that allows the easily adhesive lens L2 and the exposed portion 2a of the bonding member 2 to adhere to each other. The easily adhesive material has higher adhesiveness with the adhesive than the hardly adhesive material.

Abstract: A joined optical member 1 includes: a hardly adhesive lens L1 that is formed of a hardly adhesive material; an easily adhesive lens L2 that is formed of a easily adhesive material and is provided parallel to the hardly adhesive lens L1 in an optical axis direction; a bonding member that includes an exposed portion 2a and is embedded in the hardly adhesive lens L1, the exposed portion 2a being exposed to an outer peripheral portion 11 of a facing surface L1a of the hardly adhesive lens L1 that faces the easily adhesive lens L2; and an adhesive 3 that allows the easily adhesive lens L2 and the exposed portion 2a of the bonding member 2 to adhere to each other. The easily adhesive material has higher adhesiveness with the adhesive than the hardly adhesive material.

Abstract: An optical lens 11, which has a lens section with a refractive power, has concave marks 33, 35, 37, and 39 which are formed to be recessed on a surface of the lens section, in an effective optical lens surface which contributes to image forming of the lens section. A width of each of these concave marks 33, 35, 37, and 39 is equal to or greater than 0.05 ?m and equal to or less than 14 ?m, and a depth of recession of each concave mark is equal to or greater than 0.05 ?m and equal to or less than 5 ?m.

Abstract: It is proposed an optical substrate of which at least one surface is combined with an optical member made of a material that is different from that of the optical substrate, so as to form an optical element, in which an edge face is formed on at least a portion of an outer circumferential face of the optical substrate, and the edge face is formed in a tapered shape that is centripetally reduced from a side of the surface combined with the optical member towards an opposite side thereof.

Abstract: It is proposed an optical substrate of which at least one surface is combined with an optical member made of a material that is different from that of the optical substrate, so as to form an optical element, in which an edge face is formed on at least a portion of an outer circumferential face of the optical substrate, and the edge face is formed in a tapered shape that is centripetally reduced from a side of the surface combined with the optical member towards an opposite side thereof.

Abstract: An optical lens 11, which has a lens section with a refractive power, has concave marks 33, 35, 37, and 39 which are formed to be recessed on a surface of the lens section, in an effective optical lens surface which contributes to image forming of the lens section. A width of each of these concave marks 33, 35, 37, and 39 is equal to or greater than 0.05 ?m and equal to or less than 14 ?m, and a depth of recession of each concave mark is equal to or greater than 0.05 ?m and equal to or less than 5 ?m.