# Optics

# Optics

## Geometrical Optics

### Etendue

### Pinhole Cameras

See projective geometry

### Thin Lens

### Snell’s law

### Thick Lens

### Microscopes

### Telescopes

## Physical Optics

### Etendue 2

Numericsl Aperture

### Wavevector

Wavevectors match across boundaries. This is more geoemtry than physics or differential equations Moire Patterns

### Diffraction

Single and Double Near Field Fraunhofer Analogies with Quantum Mechanics

### Interference

Fourier Optics