Watching a show (Invasion) and spotted these strange bokeh spots in one scene. The've got a sharp grid pattern in them, and I've never seen anything like that before.
Can anyone in the #photography#optics or video #PostProduction space shed some light on how those might be created? Thinking some sort of image sensor grid moire?
Watching the World in a Dark Room
The Early Modern Camera Obscura
By Julie Park
Centuries before photography froze the world into neat frames, scientists, poets, and artists streamed transient images into dark interior spaces with the help of a camera obscura.
Illustration of the camera obscura principle from James Ayscough's A short account of the eye and nature of vision (1755 fourth edition).
A camera obscura is the natural phenomenon in which the rays of light passing through a small hole into a dark space form an image where they strike a surface, resulting in an inverted (upside down) and reversed (left to right) projection of the view outside.
Numerical calculation of the radial and angular part of a optical fibre mode. The electric field intensity is shown as a gradient going from black to green, with overlapping tiny black arrows to show the field orientation. The pattern has a hexagonal symmetry and the arrows appear to swirl around the nodes.
#PhysicsFactlet
Scattering scrambles coherent light into a speckle pattern, where the field at each point can be seen as the superposition of a large number of random phasors. At some point the result is brighter, and at some points the result is dimmer, creating the "speckly" pattern.
By changing the phase of the incident light one can change the phase of the phasors making up the resulting field, and since elastic scattering is linear, changing the phase of different input modes is going to rotate different phasors without cross-talk.
As a result it is possible to find an incident wavefront such that all the phasors making up the field at one point are in a straight line (constructive interference), resulting in a single bright dot (a focus) through a completely scattering material.
Springfield Armory has made a bold move by introducing eight new models in its TRP 1911 line, featuring the innovative Agency Optic System (AOS). This expansion also marks a historic first: the availability of TRP models chambered in 9mm Luger, a much-anticipated development for fans of the iconic 1911 platform. ...
Please share: Our Max Planck Institute recently left X and is present here on Mastodon. Give them a follow! Beautiful pictures from the science of light!
#PhysicsFactlet
It's a foggy day here in Albion, so let's talk about light (multiple) scattering!
Fog is composed of micrometre sized water droplet that can scatter light. This has two main effects: some of the light that was supposed to reach your eyes don't (because it is scattered away), and some of the light that was not supposed to reach you gets scattered into your eyes.
The denser is the fog and the further an object is from you, the more likely light is to be scattered away before it reaches your eyes. The amount of unscattered light (i.e. the one your eyes can use to form a sharp image) goes down exponentially (Lambert-Beer law), so an object in the fog gets dimmer pretty quickly. On the other hand there is a chance that light that was never meant to reach you is now scattered into your eyes, but since it arrives from a largely random direction, mixed up with a lot of other scattered light, your brain perceived it as a white blur on top of everything else. And since far away object were already dim, this white halo can easily overpower them, so you can't see them anymore.
Springfield Armory Expands TRP 1911 Line with AOS & 9mm Models
Springfield Armory has made a bold move by introducing eight new models in its TRP 1911 line, featuring the innovative Agency Optic System (AOS). This expansion also marks a historic first: the availability of TRP models chambered in 9mm Luger, a much-anticipated development for fans of the iconic 1911 platform. ...