Birefringence vs Nite Time

An interactive Michel-Lévy interference color chart that features a database of 562 minerals. Click on your observed color and section thickness, and the birefringence of your section will be automatically calculated, and candidate minerals will be suggested. The range of the chart can be be set to between 200 nm and 2500 nm. The chart can be offset by + or - λ, + or - λ/4. The chart can be used as a traditional nomogram, or displayed in a "simple" mode without the clutter of radial lines (which are no longer necessary on an interactive chart). Based on the methods of Sørensen (2013), the colors in the chart are a much truer representation of the colors seen at the microscope eye pieces than existing printed nomograms. The app includes optical and physical characteristics of candidate minerals including birefringence (minimum, maximum and mean), relief, optical character, pleochroism, color and cleavage. The app includes the Raith-Sørensen color chart, which is also interactive. The Raith-Sørensen chart is a direct representation of interference color as a function of birefringence and sample thickness (Sørensen 2013). A useful utility for polarized light microscopy, polariscopy, optical mineralogy, stress optics, or anyone with an interest in birefringent materials.

The bedside clock designed to be seen. Nite Time 2 is a simple, full-screen clock that shows the time as big and clear as possible. No clutter, no ads, no distractions—just clean, bold digits that stay on all night. I couldn't find what I wanted in the App Store, so I built it myself. Designed to be readable from across the room, even in the dark. Features: Huge, full-screen time display Swipe to control brightness 12h or 24h formats Optional AM/PM, date, battery indicator, and flashlight toggle Custom fonts and colors with a single $0.99 upgrade Screen stays on all night Nite Time 2 does one thing really well: it helps you see the time clearly, whenever you need it.