Imaging lens

An imaging lens, comprising a first lens, a second lens and a third lens, wherein

• two lenses of said first lens, said second lens and said third lens are single lenses formed of a curable resin material or a high softening temperature optical lens formation material, and the remaining one lens is a junction type compound lens comprising a first sub-lens, a second sub-lens and a third sub-lens bonded in this sequence, and
• in said junction type compound lens,
• said first sub-lens and said third sub-lens are formed of a curable resin material,
• said second sub-lens is formed of a high softening temperature optical lens formation material, and
• the following Conditions (b-1) to (b-4) are satisfied:
• 0≦|N2−N1|≦0.1 (b-1)
• 0≦|N2−N3|≦0.1 (b-2)
• 0≦|ν2−ν1|≦30.0 (b-3)
• 0≦|ν2−ν3|≦30.0 (b-4)
• where
• N1:
• refractive index of said first sub-lens
• N2:
• refractive index of said second sub-lens
• N3:
• refractive index of said third sub-lens
• ν1:
• Abbe number of said first sub-lens
• ν2:
• Abbe number of said second sub-lens
• ν3:
• Abbe number of said third sub-lens.

An imaging lens, comprising a first lens, an aperture stop, a second lens and a third lens, wherein

• said first lens, said aperture stop, said second lens and said third lens are arranged in this sequence from an object side to an image side,
• said first lens is a meniscus type single lens, a convex surface of which faces the object side on a paraxial line,
• said second lens is a junction type compound lens where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, and said first sub-lens and said second sub-lens are bonded, and said second sub-lens and said third sub-lens are bonded,
• said third lens is a junction type compound lens where a fourth sub-lens, a fifth sub-lens and a sixth sub-lens are arranged in this sequence from the object side to the image side, and said fourth sub-lens and said fifth sub-lens are bonded, and said fifth sub-lens and said sixth sub-lens are bonded,
• said first lens is formed of a curable resin material or a high softening temperature optical lens formation material,
• said first sub-lens, said third sub-lens, said fourth sub-lens and said sixth sub-lens are formed of a curable resin material,
• said second sub-lens and said fifth sub-lens are formed of a high softening temperature optical lens formation material, and
• the following Conditions (1-1) to (1-8) are satisfied:
• 0≦|N5−N4|≦0.1 (1-1)
• 0≦|N5−N6|≦0.1 (1-2)
• 0≦|ν5−ν4|≦30.0 (1-3)
• 0≦|ν5−ν6|≦30.0 (1-4)
• 0≦|N9−N8≦0.1 (1-5)
• 0≦|N9−N10|≦0.1 (1-6)
• 0≦|ν9−ν8|≦30.0 (1-7)
• 0≦|ν9−ν10|≦0.0 (1-8)
• where
• N4:
• refractive index of said first sub-lens
• N5:
• refractive index of said second sub-lens
• N6:
• refractive index of said third sub-lens
• ν4:
• Abbe number of said first sub-lens
• ν5:
• Abbe number of said second sub-lens
• ν6:
• Abbe number of said third sub-lens
• N8:
• refractive index of said fourth sub-lens
• N9:
• refractive index of said fifth sub-lens
• N10:
• refractive index of said sixth sub-lens
• ν8:
• Abbe number of said fourth sub-lens
• ν9:
• Abbe number of said fifth sub-lens
• ν10:
• Abbe number of said sixth sub-lens.

An imaging lens, comprising an aperture stop (first diaphragm), a first lens, a second diaphragm, a second lens and a third lens, wherein

• said aperture stop, said first lens, said second diaphragm, said second lens and said third lens are arranged in this sequence from an object side to an image side,
• said first lens is a junction type compound lens, where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, said first sub-lens and said second sub-lens are bonded, and said second sub-lens and said third sub-lens are bonded,
• said second lens is a meniscus type single lens, of which convex surface faces the image side on a paraxial line,
• said third lens is a junction type compound lens, where a fourth sub-lens, a fifth sub-lens and a sixth sub-lens are arranged in this sequence from the object side to the image side, said fourth sub-lens and said fifth sub-lens are bonded, and said fifth sub-lens and said sixth sub-lens are bonded,
• said second lens is formed of a curable resin material or a high softening temperature optical lens formation material,
• said first sub-lens, said third sub-lens, said fourth sub-lens and said sixth sub-lens are formed of a curable resin material,
• said second sub-lens and said fifth sub-lens are formed of a high softening temperature optical lens formation material, and
• the following Conditions (2-1) to (2-8) are satisfied:
• 0≦|N3−N2|≦ (2-1)
• 0≦|N3−N4|≦0.1 (2-2)
• 0≦|ν3−ν2|≦30.0 (2-3)
• 0≦|ν3−ν4|≦30.0 (2-4)
• 0≦|N10−N9|≦0.1 (2-5)
• 0≦|N10−N11|≦0.1 (2-6)
• 0≦|ν10−ν9|≦30.0 (2-7)
• 0≦|ν10−ν11|≦30.0 (2-8)
• where
• N2:
• refractive index of said first sub-lens
• N3:
• refractive index of said second sub-lens
• N4:
• refractive index of said third sub-lens
• ν2:
• Abbe number of said first sub-lens
• ν3:
• Abbe number of said second sub-lens
• ν4:
• Abbe number of said third sub-lens
• N9:
• refractive index of said fourth sub-lens
• N10:
• refractive index of said fifth sub-lens
• N11:
• refractive index of said sixth sub-lens
• ν9:
• Abbe number of said fourth sub-lens
• ν10:
• Abbe number of said fifth sub-lens
• ν11:
• Abbe number of said sixth sub-lens.

An imaging lens, comprising an aperture stop (first diaphragm), a first lens, a second diaphragm, a second lens and a third lens, wherein

• said aperture stop, said first lens, said second diaphragm, said second lens and said third lens are arranged in this sequence from an object side to an image side,
• said first lens is a junction type compound lens, where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, said first sub-lens and said second sub-lens are bonded, and said second sub-lens and said third sub-lens are bonded,
• said second lens is a junction type compound lens, where a fourth sub-lens, a fifth sub-lens and a sixth sub-lens are arranged in this sequence from the object side to the image side, said fourth sub-lens and said fifth sub-lens are bonded, and said fifth sub-lens and said sixth sub-lens are bonded,
• said third lens is a meniscus type single lens, of which concave surface faces the image side on a paraxial line,
• said first sub-lens, said third sub-lens, said fourth sub-lens and said sixth sub-lens are formed of a curable resin material,
• said second sub-lens and said fifth sub-lens are formed of a high softening temperature optical lens formation material,
• said third lens is formed of a curable resin material or high softening temperature optical lens formation material, and
• the following Conditions (3-1) to (3-8) are satisfied:
• 0≦|N3−N2|≦0.1 (3-1)
• 0≦|N3−N4|≦0.1 (3-2)
• 0≦|ν3−ν2|≦30.0 (3-3)
• 0≦|ν3−ν4|≦30.0 (3-4)
• 0≦|N8−N7≦0.1 (3-5)
• 0≦|N8−N9|≦0.1 (3-6)
• 0≦|ν8−ν7|≦30.0 (3-7)
• 0≦|ν8−ν9|≦30.0 (3-8)
• where
• N2:
• refractive index of said first sub-lens
• N3:
• refractive index of said second sub-lens
• N4:
• refractive index of said third sub-lens
• ν2:
• Abbe number of said first sub-lens
• ν3:
• Abbe number of said second sub-lens
• ν4:
• Abbe number of said third sub-lens
• N7:
• refractive index of said fourth sub-lens
• N8:
• refractive index of said fifth sub-lens
• N9:
• refractive index of said sixth sub-lens
• ν7:
• Abbe number of said fourth sub-lens
• ν8:
• Abbe number of said fifth sub-lens
• ν9:
• Abbe number of said sixth sub-lens.

An imaging lens, comprising a first lens, an aperture step, a second lens and a third lens, wherein

• said first lens, said aperture stop, said second lens and said third lens are arranged in this sequence from an object side to an image side,
• said first lens is a meniscus type single lens of which convex surface faces the object side on a paraxial line,
• said second lens is a meniscus type single lens of which convex surface faces the image side on a paraxial line,
• said third lens is a junction type compound lens where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, and said first sub-lens and said second sub-lends are bonded, and said second sub-lens and said third sub-lens are bonded,
• said first lens, said second lens, said first sub-lens and said third sub-lens are formed of a curable resin material,
• said second sub-lens is formed of a high softening temperature optical lens formation material, and
• the following Conditions (4-1) to (4-4) are satisfied:
• 0≦|N7−N6|≦0.1 (4-1)
• 0≦|N7−N8|≦0.1 (4-2)
• 0≦|ν7−ν6|≦30.0 (4-3)
• 0≦|ν7−ν8|≦30.0 (4-4)
• where
• N6:
• refractive index of said first sub-lens
• N7:
• refractive index of said second sub-lens
• N8:
• refractive index of said third sub-lens
• ν6:
• Abbe number of said first sub-lens
• ν7:
• Abbe number of said second sub-lens
• ν8:
• Abbe number of said third sub-lens.

An imaging lens, comprising an aperture stop (first diaphragm), a first lens, a second diaphragm, a second lens and a third lens, wherein

• said aperture stop, said first lens, said second diaphragm, said second lens and said third lens are arranged in this sequence from the object side to the image side,
• said first lens is a biconvex lens of which both side faces are convex surfaces,
• said second lens is a junction type compound lens, where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, said first sub-lens and said second sub-lens are bonded, and said second sub-lens and said third sub-lens are bonded,
• said third lens is a meniscus type single lens of which concave surface faces the image side on a paraxial line,
• said first lens, said first sub-lens and said third sub-lens are formed of a curable resin material,
• said second sub-lens and said third lens are formed of a high softening temperature optical lens formation material, and
• the following Conditions (5-1) to (5-4) are satisfied:
• 0≦|N6−N5|≦0.1 (5-1)
• 0≦|N6−N7|≦0.1 (5-2)
• 0≦|ν6−ν5|≦30.0 (5-3)
• 0≦|ν6−ν7|≦30.0 (5-4)
• where
• N5:
• refractive index of said first sub-lens
• N6:
• refractive index of said second sub-lens
• N7:
• refractive index of said third sub-lens
• ν5:
• Abbe number of said first sub-lens
• ν6:
• Abbe number of said second sub-lens
• ν7:
• Abbe number of said third sub-lens.

An imaging lens, comprising an aperture stop (first diaphragm), a first lens, a second diaphragm, a second lens and a third lens, wherein

• said aperture stop, said first lens, said second diaphragm, said second lens and said third lens are arranged in this sequence from an object side to an image side,
• said first lens is a junction type compound lens where a first sub-lens, a second sub-lens and a third sub-lens are arranged in this sequence from the object side to the image side, said first sub-lens and said second sub-lens are bonded, and said second sub-lens and said third sub-lens are bonded,
• said second lens is a meniscus type single lens of which convex surface faces the image side on a paraxial line,
• said third lens is a meniscus type single lens of which concave surface faces the image side on a paraxial line,
• said first sub-lens, said third sub-lens and said second lens are formed of a curable resin material,
• said second sub-lens and said third lens are formed of a high softening temperature optical lens formation material, and
• the following Conditions (6-1)-(6-4) are satisfied:
• 0≦|N3−N2|≦0.1 (6-1)
• 0≦|N3−N4|≦0.1 (6-2)
• 0≦|ν3−ν2|≦30.0 (6-3)
• 0≦|ν3−ν4|≦30.0 (6-4)
• where
• N2:
• refractive index of said first sub-lens
• N3:
• refractive index of said second sub-lens
• N4:
• refractive index of said third sub-lens
• ν2:
• Abbe number of said first sub-lens
• ν3:
• Abbe number of said second sub-lens
• ν4:
• Abbe number of said third sub-lens.