07-04-2023 дата публикации
Номер: CN115933122A
Принадлежит:
The invention discloses an industrial barcode recognition lens. A diaphragm (STO), a first lens (G1), a second lens (G2), a third lens (G3), a fourth lens (G4) and chip protection glass (G5) are sequentially arranged from an object plane to an image plane; the first lens (G1) is a positive lens, the object side surface is a convex surface, the image side surface is a convex surface, and both are spherical surfaces; the second lens (G2) is a negative lens, the object side surface is a concave surface, the image side surface is a concave surface, and both are spherical surfaces; the third lens (G3) is a positive lens, the object-side surface is a concave surface, the image-side surface is a convex surface, and the object-side surface and the image-side surface are both spherical surfaces; the fourth lens (G4) is a positive lens, the object side surface is a convex surface, the image side surface is a convex surface, and both are spherical surfaces; the four lenses are all made of glass materials ...
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