A 5-piece dome projection lens and system
A projection lens and projection system technology, applied in the field of dome projection lenses and systems, can solve the problems of excessive number of lenses, increased production costs, and reduced production efficiency, and achieve high transmittance, save man-hours, and improve production efficiency Effect
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Embodiment 1
[0040] A 5-piece ball screen projection lens, comprising a main lens barrel 1, a fifth lens 2, a fourth lens 3, a third lens 4, a second lens 5 and a first lens arranged on the main lens barrel 1 in sequence along the optical path 6. The first lens 6 is a convex-concave lens with a focal length of -70mm; the second lens 5 is a biconcave lens with a focal length of -70mm; the third lens 4 is a biconcave lens with a focal length of -80mm; Four lenses 3 are plano-convex lenses with a focal length of 60 mm; the fifth lens 2 is a plano-convex lens with a focal length of 100 mm, and the first lens 6, the second lens 5, the third lens 4, the fourth lens 3 and the fifth lens 2 is PMMA optical plastic; the first surface S1 of the first lens 6 is spherical, R1=1000mm, the second surface S2 is aspheric, R2=24mm, K2=0.2, 4th=-1.1e-5, 6th =-4.3e-9, 8th=-4.1e-12; the first surface S3 of the second lens 5 is spherical, R3=-60mm, the second surface S4 is aspheric, R4=24mm, K2=0.2 , 4th=-6e-6...
Embodiment 2
[0042]A 5-piece ball screen projection lens, comprising a main lens barrel 1, a fifth lens 2, a fourth lens 3, a third lens 4, a second lens 5 and a first lens arranged on the main lens barrel 1 in sequence along the optical path 6. The first lens 6 is a convex-concave lens with a focal length of -40mm; the second lens 5 is a biconcave lens with a focal length of -40mm; the third lens 4 is a biconcave lens with a focal length of -40mm; The four lenses 3 are plano-convex lenses with a focal length of 120 mm; the fifth lens 2 is a plano-convex lens with a focal length of 300 mm, and the first lens 6, the second lens 5, the third lens 4, the fourth lens 3 and the fifth lens 2 is PMMA optical plastic; the first surface S1 of the first lens 6 is spherical, R1=2000mm, the second surface S2 is aspherical, R2=32mm, K2=0.4, 4th=-1.5e-5, 6th =-6e-9, 8th=-6e-12; the first surface S3 of the second lens 5 is spherical, R3=-90mm, the second surface S4 is aspherical, R4=42mm, K2=0.4, 4th =-...
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