Patent ID: 9170402
Filing Date: 2015-10-27
Classification: G02B

Abstract:
1. An optical unit comprising, seen in the direction from the object side to the imaging surface, a first lens, a second lens and a diaphragm present in the light path between the first lens and the second lens, wherein a distance between the vertex of the object side surface of the first lens and the vertex of the image-side surface of the second lens along an optical axis is 250-650 μm, wherein the diaphragm is a non-transparent carrier provided with an opening which is transparent to incident light from the object side, which carrier in particular has a thickness of 10-500 μm, preferably 20-400 μm, wherein seen in the direction from the object side to the imaging surface, a third lens is disposed behind the second lens, which third lens abuts against a substrate, wherein a fourth lens abuts against the substrate, seen in the direction of the imaging surface, wherein the ratio between the distance between the vertex of the object side surface of the first lens and the vertex of the image-side surface of the second lens along an optical axis and the distance between the vertex of the object side surface of the third lens and the vertex of the image-side surface of the fourth lens along an optical axis ranges between 0.4 and 0.7.