# Loomrume

> An editor for light experiments in the browser: mirrors, lenses, and ray paths. Studio is live now; native apps come later.

Studio runs in the browser. Schemes stay on this device unless you share a link. Native apps are not shipping yet.

## Docs

- [About](https://www.loomrume.com/about): Why Loomrume exists, and what kind of light model it draws in the browser.
- [FAQ](https://www.loomrume.com/faq): Short answers about Studio, sharing schemes, and how Loomrume handles your data.
- [Examples](https://www.loomrume.com/examples): Open Newton’s prism, Cooke triplet, Malus’s law, and other light experiments in the browser.
- [Privacy](https://www.loomrume.com/privacy-policy): Privacy policy for Loomrume: experiments and settings stay on your device. No advertising tracking.

## Light phenomena

- [Malus's law](https://www.loomrume.com/examples/malus-law.md): Two polarizer benches side by side — crossed dims the beam, parallel lets it through.
- [Brewster reflection](https://www.loomrume.com/examples/brewster-reflection.md): Glass at one special angle: the reflection is polarized, and an analyzer can kill the glare.
- [Newton prism](https://www.loomrume.com/examples/newton-prism.md): White light through a triangular prism fans into a spectrum — Newton’s classic demo.
- [Single-slit diffraction](https://www.loomrume.com/examples/single-slit.md): A narrow beam through a thin slit fans into stripes on the screen — diffraction, not a hard shadow.
- [Fresnel biprism](https://www.loomrume.com/examples/fresnel-biprism.md): A shallow double wedge splits one beam into two that overlap on the screen like twin sources.
- [Fluorescence](https://www.loomrume.com/examples/fluorescence.md): Blue light hits a fluorescent plate — what’s absorbed comes back out as green.
- [Frequency doubler](https://www.loomrume.com/examples/frequency-doubler.md): Red light through a doubler crystal — leftover red and a violet harmonic share the path onward.

## Lenses & stacks

- [Lens gallery](https://www.loomrume.com/examples/lens-gallery.md): The same white beam through a few different lenses — focus and colour fringing side by side.
- [Achromat doublet](https://www.loomrume.com/examples/achromat-doublet.md): Two glasses glued together so white light focuses with less colour fringing.
- [Cemented triplet](https://www.loomrume.com/examples/cemented-triplet.md): Three glasses in one cemented stack — a bit more correction than a simple doublet.
- [Air-spaced doublet](https://www.loomrume.com/examples/airspaced-doublet.md): Two lenses almost touching, with a thin air gap instead of glue.
- [Petzval portrait](https://www.loomrume.com/examples/petzval-portrait.md): Two cemented pairs with a stop between them — the classic fast portrait lens.
- [Tessar](https://www.loomrume.com/examples/tessar.md): Front element, air-spaced flint, a stop, then a cemented rear pair — the classic Tessar.
- [Planar](https://www.loomrume.com/examples/planar.md): A symmetric Double-Gauss: two cemented halves around a stop — the Planar layout.
- [Cooke triplet](https://www.loomrume.com/examples/cooke-triplet.md): Three air-spaced lenses in a +/−/+ stack — a simple photographic objective on white light.

## Instruments

- [Newtonian reflector](https://www.loomrume.com/examples/newtonian-reflector.md): A big concave mirror and a small flat at 45° — Newton’s reflector with an eyepiece off to the side.
- [Galilean telescope](https://www.loomrume.com/examples/galilean-telescope.md): A convex objective and a concave eyepiece — the view stays upright, the beam comes out narrower.
- [Keplerian telescope](https://www.loomrume.com/examples/keplerian-telescope.md): Two convex lenses with a focus between them — brighter magnification, but the image is upside-down.
- [Cassegrain reflector](https://www.loomrume.com/examples/cassegrain-reflector.md): Light hits a concave primary, bounces off a convex secondary, and focuses back toward the front.
- [Camera obscura](https://www.loomrume.com/examples/camera-obscura.md): A dark box with a tiny hole — scenes outside land upside-down on the far wall.
- [Slide projector](https://www.loomrume.com/examples/slide-projector.md): A bright slide beyond the focal length — one lens throws an inverted picture onto the screen.
- [Periscope](https://www.loomrume.com/examples/periscope.md): Two flat mirrors at 45° — you look high, the view comes out lower.
- [Kaleidoscope](https://www.loomrume.com/examples/kaleidoscope.md): Three mirrors in a triangle — coloured beams bounce until the field fills with a repeating pattern.
- [Right-angle prism](https://www.loomrume.com/examples/right-angle-prism.md): Two right-angle prisms turn the beam by total internal reflection — white light lands on the screen.

## Optional

- [Studio](https://www.loomrume.com/studio): Build light experiments in the browser — edit, save, import, and export on this device.
- [Русская версия](https://www.loomrume.com/ru/llms.txt)