field of view中文

It isn't necessarily. It could also be transmitted and continue to propagate through the new material. (This is how you can see things through a glass window)

Lenses are build from several individual lenses. When focusing a lens there is a change in length from the first to the last lens but also a change in position of the lenses to each other. The latter is necessary to assure that the different wavelengths meet again at one point. Since these changes are made via mechanical slide rails, a different anchor point is hit when the direction of rotation is reversed and ensures a slightly different overall focal length and lens positions.

FOVto focal length

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.

FOVcalculator

Light is absorbed if it is propagating in a material and that material has some particles in it that are able to absorb light at that particular wavelength and be promoted into a higher energy state. Particles here could be electrons, but they could also be things like phonons (quantized lattice vibrations).

Suggestions for improving the documentation? Send us your feedback. For technical questions, please contact your local distributor or use the support form on the Basler website.

fov参数

Light is reflected if there is a difference in the index of refraction of the two materials, or if the second material is highly conductive (for example, metal).

This website is being translated through machine translation by a third-party service. Basler does not warrant the accuracy, reliability or timeliness of any information translated by this system and will not accept liability for loss or damage incurred as a result. Content that has not yet been translated appears in English. Switch to English version

We use cookies to provide site search, store your settings, and to analyze the usage of the documentation. With your consent, you're helping us to make our documentation better.

fov和焦距的关系

Different lenses from different manufacturers most likely have different tolerances for that. Unfortunately, Basler doesn't have any details about that.

fov是什么

And expanding upon that, why is light absorbed by a material if it is not reflected? Thinking about it like atomic emission spectra, the other light should pass through. I know this is not the case because these are molecules and have many more energy levels that single atoms, but in the case that all of the light is absorbed, why is only some of it reflected? What dictates whether light is absorbed or reflected?

FOVto focal length calculator

In the case of specular reflection, the photons just propagate according to Maxwell's equations. A high conductivity material or a boundary between materials with different index of refraction causes a boundary condition that causes the light wave to reflect. There's no absorption of the photons involved.

To access the Basler Product Documentation, use one of the following browsers: Google Chrome Microsoft Edge Mozilla Firefox

Do the atoms within a material absorb the photons and re-emit them in the direction they came back from (similar to atomic emission spectra, but slightly different because this involves hybridization of orbitals), or for some other reason?

As a workaround, Basler recommends focusing the image only from one direction or by changing the distance of the camera and lens to the object.

You may notice that the field of view (FOV) is moving up and down while focusing the lens by rotating its ring clockwise and counterclockwise.

So if there's a light beam impinging on a surface, to be absorbed it should first not be (completely) reflected at the surface, and then it is absorbed as it begins to propagate into the material.