Lecture 11 Spectrometers Spr2010

Lecture 11 Spectrometers Spr2010 - Spring 2010 Mat 288S...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Spring 2010 Mat 288S Optoelectronic Measurements 1 Spectroscopy Diffraction gratings Resolution Throughput Interferometers Filters Spring 2010 Mat 288S Optoelectronic Measurements 2 Terminology Spectrometers measure wavelengths, monochromators separate wavelengths Scanning grating Fixed grating with linear array Fixed grating with area array Laser spectroscopy: tunable laser as monochromator Interferometers Filters Spring 2010 Mat 288S Optoelectronic Measurements 3 Diffraction Gratings a m d i = + sin sin Ruled gratings: up to 1200 lines/mm (a = 0.83 m) Holographic gratings: 150-5670 lines/mm Grating width, W: 1 mm 12 cm Spring 2010 Mat 288S Optoelectronic Measurements 4 Grating Efficiency Polarization dependent Blazed gratings shift energy into particular order Efficiency falls fast at < blaze Spring 2010 Mat 288S Optoelectronic Measurements 5 Grating Monochromator White light in Red image Blue image Green light out Mirrors determine system focal length f, and NA (f/#) Spring 2010 Mat 288S Optoelectronic Measurements 6 Resolution d a fm d dL cos = Linear Dispersion: Slit-limited resolution: dispersion linear slit width = Aberration-limited resolution: coma ~ NA 3...
View Full Document

This note was uploaded on 02/02/2011 for the course ECE 227A taught by Professor Coldren during the Spring '08 term at UCSB.

Page1 / 24

Lecture 11 Spectrometers Spr2010 - Spring 2010 Mat 288S...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online