Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

The triangles (large and small) are similar, that is angles are the same. So Angle of view will be the same as top angle (at the lens) of the smaller triangle. From that, since you know what sensor size and angle of view is, you can calculate focal length in pixels, as @remco calculated for you.

As your sensor size is given in pixels (assumed square pixels!), your focal length will also be in pixels. To get it in a more usual unit (m), you need to know the pixel size.

Zoom in or out on web content using the zoom button and mouse scroll wheel for more comfortable reading. That to each percent value.

Zoom images/videos on all your favorite websites (Facebook, Amazon, etc). Simply hover your mouse over the image to enlarge it.

Jun 5, 2017 — The angle of view describes the geometry of the lens. Field of view describes the scene on the camera sensor. On a wide Angle lens the angle of ...

It is what Hermann said, focal length is NOT measured in pixels. I strongly doubt the engineering journal said focal length was pixels.

Zoom in or out on web content using the zoom button and mouse scroll wheel for more comfortable reading. That to each percent value.

Designed for laboratory, education, industry, or medical applications, it boasts an expandable 3.5x - 90x magnification range and built-in camera. It offers 360 ...

Magnifying glass app

What you need to know for field of view is the camera sensor size (or film size) measured in mm. You must compute with sensor dimensions in mm.

ASUS Webcam C3 USB Camera with 1080p 30 fps Recording, Beamforming Microphone.

Magnifying Glass for Reading

It's basic geometry: you have a right angle triangle, with half the FOV as one of the angles (a), and half your image size as the opposite side (A). To calculate the focal length F, use tan(a) = A/F, which gives F = A/tan(a).

Magnifying Glass with Light

Instantly Zoom Text And Images For Clear, Enhanced Viewing. Perfect For Browsing With Precision Using Magnifying Glass (Hover Zoom)!

Buki 150 chemistry experiments chemical-free and therefore safe! Achieve fun and only scientific experiments with everyday products such as salt, vinegar, ...

Magnifying Glass Amazon

There is a calculator that will do this at https://www.scantips.com/lights/fieldofview.html (Option 6). The geometry is shown at bottom of that page, however, you must use Trig for angles.

Zoom images/videos on all your favorite websites (Facebook, Amazon, etc). Simply hover your mouse over the image to enlarge it.

Terrestrial laser scanners (TLS) are suitable for the surface approximation of objects and their geometric changes due to the temporally and spatially high- ...

We are the ONLY privately owned facility in India equipped with MULTIPLE diamond turning machines. Mechvac offers in-house single point diamond turning services ...

Best magnifying glass

In fact, units of the sensor size should be exactly the same as units of the focal length to make sense of F=A/tan(a). What you can get from that is, if you have bigger pixels (in cm), you will need larger focal length (in cm) for same field of view and number of pixels.

A lens is merely a carefully ground or molded piece of transparent material that refracts light rays in such as way as to form an image. Lenses can be thought ...

POLARIZING meaning: 1. present participle of polarize 2. to cause something, especially something that contains…. Learn more.

8mm film length converter ; Film type, Regular 8mm, Super 8mm ; Length. Speed 16.67. frames per second. Speed 18. frames per second ; 50 feet, 3 inches diam. (15 ...

Instantly Zoom Text And Images For Clear, Enhanced Viewing. Perfect For Browsing With Precision Using Magnifying Glass (Hover Zoom)!

Jan 25, 2019 — 'Edmond,' a 'Shakespeare in Love'-like take on the story behind the French hit play 'Cyrano,' is a crowd-pleaser starring Thomas Soliveres, ...

magnifying glass中文

Magnifying Glass (Hover Zoom) is a lite addon that enables you to magnify a portion of a webpage with a click of a button. Please click on the toolbar button once to see the magnifying glass. Then move your mouse to see the magnified page within a circular section. If you want to hide the magnifier, simply click on the toolbar button once or click anywhere on the page. This addon has also an options page to adjust the magnifier zoom level and coverage area. Moreover, the toolbar button serves as an ON|OFF switch to turn the addon ON or OFF. Note 1: when you install the addon, it is turned off. Please click on the toolbar button once to activate the addon. The toolbar icon is red when the addon is active and grey when it is inactive. Note 2: if you want to change the zoom level, please visit the addon's options page. To report bugs, please fill out the bug report form on the addon's homepage (https://mybrowseraddon.com/magnifying-glass.html).

The article specifies that the horizontal FOV is 47°, so we have to use A = 640/2 = 320, a = 47°/2 = 23.5°, which give F = 736 pixels.