+852 6066 4630

info@apexeloptic.com

Help Center
Track your oders
Search
Apexel
  • Home
  • Shop
    • Outdoor Optics
      • Monoculars
      • Binoculars
      • Rangefinder
      • Night vision
    • Mobile Lens
      • Macro Lens
      • Wide Angle Lens
      • Telephoto Lens
      • Fisheye Lens
      • Anamorphic Lens
      • Mobile Lens Kit
    • Microscope
      • Digital microscope
    • Vlogging Accessories
      • Gimbal Stabilizer
      • Video Lighting
      • Vlogging Kit
  • Capabilities
    • Manufacturing Capabilities
      • Aspheric
      • Spherical
      • Optical Coatings
      • Filter Coatings
      • Prisms
    • Research and development
    • Manufacturing
    • Quality
  • Volume OEM&ODM
  • Solutions
    • Security and Surveillance
    • Automotive
    • Medical imaging
    • Machine vision
    • LOT Lenses
    • AR/VR
  • Become Our Partner
    • About us
    • Contact us
    • Recruit Internet Celebrity in the World
  • Resource
    • Service & Support
    • Blog
    • Video
    • Warranty
    • Optical knowledge

Blog

Introduction to Spherical Lens

Apexeloptic2022-09-17T06:16:09+00:00
Optical product knowledge

A spherical lens is a spherical lens whose optical function is to make parallel rays form a focal point F. In eyeglass optics, there are thin lenses and thick lenses.

A spherical lens is the reflecting surface of a part of a sphere. The surface may be convex or concave. A concave spherical lens has an inward convex reflecting surface and reflects light inward. A convex spherical lens has a reflective surface raised toward the light source and reflects light outward. The substrate materials of the spherical lens include various optical glass, ultraviolet fused quartz, infrared fused quartz, calcium fluoride (CaF2), magnesium fluoride (MgF2), zinc selenide (ZnSe), germanium (Ge), silicon (Si), etc., and provide various optical films such as anti-reflective film, highly reflective film, beam splitting film, metal film, etc. The wideband antireflective film can be applied to ultraviolet, visible, near-infrared, and mid-infrared bands.

A lens is said to be thin if its center is so thin that its optical properties are independent of its shape and form, that is, whether the shape of a convex lens is biconvex, planoconvex, or concave-convex; No matter the shape of concave lens is double concave, flat-concave or convex-concave, the influence of the central thickness on its optical properties can be ignored, and we can call it a thin lens. In this case, the convex lens is represented by a double arrow facing each other, while the concave lens is represented by a double arrow facing each other.

Spherical Lens

(1) Spherical lens classification

Concave mirror: A spherical mirror with the inner side of the spherical surface as a reflecting surface is called a concave mirror. Convex lenses can be divided into three forms: double convex, flat-convex, and concave-convex.

Convex mirror: A spherical mirror with the outside of the spherical surface as the reflecting surface is called a convex mirror. Concave lenses can be divided into three forms: double concave, flat-concave, and convex concave.

(2) Optical properties of spherical lenses

1. Spherical lenses have the ability to bend and focus light.

2. The spherical lens bends rays equally at all meridians.

3. Top focus: A unit of measure used to describe the flexion capacity of a lens to light rays. It is numerically equal to the inverse of the focal length of the lens. Namely, F=1/ F where F is the focal length and F is the top focal degree. The unit of top focal degree is diopter and the symbol is “D”.

4. Specular degree of the spherical lens; A spherical lens has two interfaces, each of which has the ability to bend the incoming light rays. The ability of each interface to bend the light rays is expressed by the top focal degree, which is called the surface mirror degree.

5. Top focal degree of spherical lens for an eye; The top focal degree of a spherical lens is equal to the sum of the two diameters of the sphere, namely F=F1+F2

(F is the top focal degree of the spherical lens, F1 is the mirror degree of the front surface of the spherical lens, and F2 is the mirror degree of the rear surface of the spherical lens)

6. Visual image shift of spherical lens; Put -3.00D in front of your eyes, observe the distant target through the mirror, and slowly move the lens up and down in parallel, the target will also move up and down: when the lens is moved left and right in parallel, the target will also move left and right, and the movement of the target is consistent with the translation direction of the mirror, which is called forward movement. Put +1.00D in front of your eyes, observe the distant target through the mirror, and slowly move the lens up and down in parallel, it will be found that the target moves against the direction of the mirror, which is called inverse motion.

Share this post

Facebook Twitter LinkedIn Google + Email

Related Posts

Microscope Maintenance Method

A microscope is an optical instrument consisting of a lens or a combination of lenses.... read more

Lens design fundamentals and the role of filters

Basic principles of lens design: Any lens, new or old, can be distinguished by the... read more

What are the main techniques used in industrial lenses?

Many people may not be able to tell the difference, so you have to understand... read more

Tips for lens selection

The size of the lens can directly determine the subject of the actual photograph taken,... read more

Type of optical microscope 

Optical microscopes can be classified into three, binocular and monocular microscopes according to the number... read more

Lens distortion

Camera calibration usually adopts the aperture imaging model, and the ideal aperture model is a... read more

Optical lens assembly process and production process

An optical lens manufacturer is an indispensable part of the machine vision system, which directly... read more

What are the requirements for the quality of optical glass lenses?

The importance of optical glass lens has become an essential part of the machine vision... read more

7 important optical parameters of the microscope

In the microscopic examination, people always hope to get clear and bright ideal images, which... read more

Application of the optical thin film

Optical thin film is a kind of functional thin film that uses the action of... read more

  • Optical solutions
  • Binoculars
  • Hunting/Shooting Advice & Tips
  • Macro Lens
  • Telephoto Lens
  • Wide Angle Lens
  • Stick Tripod
  • Pre Sales

About The Blog

Recent Posts

Apexel Smartphone Adapter(APL-F002)
Apexel Optic Camber Technology
Optical coating technology
Apexel Optic Camber Technology
Optical coating

Apexel

OPTICAL SOLUTIONS

  • Security lenses
  • Automotive lenses
  • Medical imaging
  • Machine vision
  • loT lenses
Instagram Facebook-f Linkedin Youtube

CUSTOMER SERVICES

  • Return policy
  • Mode of transport
  • About us
  • Contact us
  • Privacy Policy
  • Track your orders
  • Terms of service

SUBSCRIBE NEWSLETTER

Get all the latest information on events, sales and offers. Sign up for newsletter:

Check your inbox or spam folder now to confirm your subscription.

©  2022 Shenzhen Apexel.  All Rights Reserved
  • Home
  • Shop
    • Outdoor Optics
      • Monoculars
      • Binoculars
      • Rangefinder
      • Night vision
    • Mobile Lens
      • Macro Lens
      • Wide Angle Lens
      • Telephoto Lens
      • Fisheye Lens
      • Anamorphic Lens
      • Mobile Lens Kit
    • Microscope
      • Digital microscope
    • Vlogging Accessories
      • Gimbal Stabilizer
      • Video Lighting
      • Vlogging Kit
  • Capabilities
    • Manufacturing Capabilities
      • Aspheric
      • Spherical
      • Optical Coatings
      • Filter Coatings
      • Prisms
    • Research and development
    • Manufacturing
    • Quality
  • Volume OEM&ODM
  • Solutions
    • Security and Surveillance
    • Automotive
    • Medical imaging
    • Machine vision
    • LOT Lenses
    • AR/VR
  • Become Our Partner
    • About us
    • Contact us
    • Recruit Internet Celebrity in the World
  • Resource
    • Service & Support
    • Blog
    • Video
    • Warranty
    • Optical knowledge
  • Log In
  • Register