project:spectrum
This is an old revision of the document!
Table of Contents
Multispectral Specimen Index
Catalogue comparing light reflection, absorption, and structural signatures across:
- Visible (380–700nm),
- Near-Infrared / NIR (700–1000nm)
- Ultraviolet / UV (300–400nm)
Wavebands using full-spectrum sensor rigs and bandpass filters.
To be added / notes
- UV re-emissions column (i.e. visible light (neon colours) from UV, what most people think of as what UV reveals.)
- NIR-bandpass filter (falsecolour from my DSLR which contrasts visible light i.e. my other NIR photography.)
Botanical & Flora
| Specimen | Visible (VIS) | Near-Infrared (NIR) | Ultraviolet (UV) | Spectral Notes |
|---|---|---|---|---|
| Mountain Ash |  |  |  | High NIR foliage bounce; dark UV absorption across ripe berry clusters. |
| Rose Hips |  |  |  | Waxy cuticle UV bounce; contrasting dark hip body vs bright NIR foliage. |
| Himalayan Blackberry |  |  |  | Strong foliage NIR bloom; high-gloss drupelet UV absorption. |
| Oregon Grape |  |  |  | Heavy cuticle UV surface scattering; high parenchymal NIR reflection. |
| Morning Glory / Moonflower |  |  |  | Throat absorbs UV heavily (“bullseye target”) vs reflective outer limb. |
| Lavender |  |  | Essential oil trichomes scatter UV; calyx tissue absorbs UV. | |
| Lavender Yarrow |  |  | Disc florets absorb UV intensely; ray petals maintain UV contrast. | |
| Himalayan Balsam |  |  |  | Pronounced UV absorption gradient running into inner throat. |
| Black-Eyed Susan |  |  | Central cone & inner petal bases absorb UV; outer tips reflect UV. | |
| Daylily |  |  | Anthers & nectar guides absorb UV sharply against reflective petals. | |
| Meadow Dandelion |  |  |  | Inner floret base absorbs UV, creating a prominent radial bullseye. |
Found Objects & Feathers
| Specimen | Visible (VIS) | Near-Infrared (NIR) | Ultraviolet (UV) | Structural Notes |
|---|---|---|---|---|
| Blue Jay Feather |  |  |  | Tyndall structural blue drops out in NIR (melanin base absorbs); keratin scatters UV which birds can observe. |
Body & Optical Applications
TBA - better photos to demonstrate, placeholder.
| Specimen | Visible (VIS) | Near-Infrared (NIR) | Ultraviolet (UV) | Bandpass/Absorption Notes |
|---|---|---|---|---|
| Sunscreen Application | Invisible in VIS/NIR; (Note: Chemical/carbon-based i.e. oxybenzone absorbs and is jet-black, mineral-based sunscreens however reflect instead!) | |||
| Clear Corrective Lenses | Transparent in VIS/NIR; opaque UV-blocking coating block. |
project/spectrum.1785749171.txt.gz · Last modified: by wikarai
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
