How does a biological microscope work? Refraction and refractive index Light is transmitted in a uniform isotropic medium in a straight line between two points. When passing through transparent objects of different density medium, refraction occurs due to the different propagation speeds of light in different media. When light that is not perpendicular to the transparent object is incident on a transparent object (such as glass) by air, the light changes direction at its interface and forms a refraction angle with the normal. Biomicroscope lens performance The lens is the most basic optical component that makes up the microscope's optical system. The components such as the objective lens and the concentrating mirror are composed of single and multiple lenses. Depending on its shape, it can be divided into convex lens (positive lens) and concave lens (negative lens). Five imaging rules of biological microscope convex lens 1. When the object is located outside the focal length of the object of the lens, a reduced inverted real image is formed within the focal length of the image and outside the focus; The use of liquid crystal display under strong light is one of the development directions of liquid crystal display devices. At present, the liquid crystal display of the mainstream liquid crystal display device can get better display effect under the ordinary environment light. Hengstar can provide 10.4~55 inch high brightness Industrial LCD screen with brightness of 1000nits and above. Outdoor bright industrial LCD panel can meet the requirements of clear and visible in strong sunlight. For outdoor high brightness LCD screen selection, please find hengstar. sunlight readable monitors,sunlight viewable monitor,sunlight readable computer monitor,sunlight readable display,sunlight readable touch screen monitor,direct sunlight monitor Shenzhen Hengstar Technology Co., Ltd. , https://www.angeltondal.com
When a beam of light parallel to the optical axis passes through the convex lens and intersects at a point, this point is called the "focus", passing through the intersection and perpendicular to the plane of the optical axis, called the "focal plane". There are two focal points, the focus of the object space, called the "object focus", the focal plane of the object, called the "object focal plane"; conversely, the focus of the image space, called the "image focus", The focal plane at the point is called "image square focal plane".
After the light passes through the concave lens, it becomes an erect virtual image, and the convex lens becomes an erect real image. The real image can appear on the screen, and the virtual image cannot.
2. When the object is located at twice the focal length of the object of the lens, an inverted image of the same size is formed on the image twice the focal length;
3. When the object is located within twice the focal length of the object of the lens, outside the focus, an enlarged inverted image is formed outside the focal length of the image;
4. When the object is at the focus of the object of the lens, then the image cannot be imaged;
5. When the object is located within the focal point of the object of the lens, then the image is formed without image, and an enlarged erect virtual image is formed on the same side of the object side of the lens.