COCO OPTICS
News
26
2023
-
04
Lens Knowledge Points in Life
Author：
camera:
1. The lens is a convex lens
2. The distance from the object to the lens (object run) is greater than twice the focal length, resulting in an inverted and reduced real image projector:
1. The lens of the projector is a convex lens:
2. The function of the flat mirror of a projector is to change the direction of light propagation (note: cameras and projectors should make the image larger and keep the lens close to the object, away from the film or screen);
3. The distance from the object to the lens (object run) is less than twice the focal length and greater than one focal length, resulting in an inverted and magnified real image magnifying glass:
1. A magnifying glass is a convex lens;
2. The distance (object distance) from the magnifying glass to the object is less than twice the focal length, resulting in an enlarged and upright virtual image; Note: To make the object larger, the magnifying glass should be kept away from the object.
1. Imaging characteristics of slide projector and projector: When an object is between one and two focal lengths of a convex lens, it becomes an inverted and magnified real image. Attention: The slides should be placed upside down (upside down, left and right upside down).
2. Camera imaging point: An inverted and reduced real image of an object beyond twice the focal length of a convex lens
Reflection 1: After taking a group photo, take a single person photo (with the camera closer to the person and the dark box elongated)
Reflection 2: Some people in the photo did not enter the camera (the camera should be kept away from the person. The dark box should be shortened)
Latest News
2023-04-26
Differences and laws of lenses
Different structures A convex lens is composed of a transparent mirror body ground into a spherical surface on both sides, with thin sides and thick middle.
2023-04-26
Classification of lenses
Convex lens A convex lens is a lens with a thicker center and thinner edges. Convex lenses have the function of converging light lines, so they are also called "converging lenses" or "positive lenses" (can be used for farsightedness and reading glasses). This type of lens can be divided into:
2023-04-26
What is the definition of a lens and what is a lens?
There are six types of lenses. A lens is made according to the laws of light refraction. A lens is an optical element made of transparent substances such as glass, crystal, etc. A lens is a refracting mirror with two spherical surfaces, or a transparent body with one spherical surface and one plane. The image it forms has both real and virtual images. Lenses can generally be divided into two categories: convex lenses and concave lenses.
2023-04-26
Lens knowledge points
Magnifier: A convex lens with a short focal length that can magnify smaller objects, but the object must be within one focal length of the convex lens, presenting a magnified upright virtual image
2023-04-26
Summary of Lens and Its Application Knowledge Points
1. Convex lens: A lens with a thick center and thin edge, which has a converging effect on light, so it is also called a converging lens.