Optics Forum

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I Energy of Electromagnetic Waves in Destructive Interference
2
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B Rainbow light reflection on TV from my hand
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10
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440
B The focal length of the eye and image inversion
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10
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833
B Aperiodic Diffraction Grating
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3
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655
I Energy Redistribution in Lorentz Oscillator Model with Pure Radiation Damping
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2
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321
B Deriving Snell's Law
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470
I Mie scattering in clouds at 940 nm
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29
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890
B Purity of Interference Pattern in a Classical Double-slit Experiment
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22
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1K
A Infrared spectrophotometer DIY
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3
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939
I Is This....Right? Splitting LED colors is not working for me
2
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36
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2K
A A double slit thought experiment leading to a paradox
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5
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2K
I Confusion about line pairs per millimeter
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4
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927
A Trying to source Photochromic lenses based on laboratory data
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1
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993
Effects of coherence length on optical interference filter
2
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66
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5K
A Tilting mirror in Fourier plane
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9
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840
A Zemax raytracing and which lens element is the STOP
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10
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828
I Explanation for homemade digital microscope's optical systems?
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4
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2K
I Digital Micromirror Device based optical setup
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7
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1K
B The principle of operation and application of optical lenses
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14
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1K
I Can the wavelength of an EM wave exceed the size of the observable universe?
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17
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2K
I Laser beam enlargement
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2
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733
I How to couple light from a very small source into spectrometer?
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10
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1K
I Understanding magnification of concave mirrors for near-eye situation?
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11
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2K
I LED Detection Range with Night Vision Goggles?
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3
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1K
I Snell's law from a mechanical model
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12
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1K
I Dispersion: Why are Sine-like Functions Fundamental?
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6
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948
I Recreating Spectral Response from 6-Channel Color Sensor
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6
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3K
A Limitations on complex angle of refractions
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1
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835
A Relative efficiency of SHG vs SFG
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6
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1K
I Spectrometer Shows More Blue light on cloudy Day....why?
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4
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1K
I Why is there a sharp spike of blue light in my spectrometer readings?
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9
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1K
I Image construction with concave and convex mirrors
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4
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1K
I Reflection on plexiglass
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18
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1K
A How should the optical diffraction field be solved?
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8
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1K
A The coherence length is much longer than the manufacturer claims
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10
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2K
A Optics: how gather and align light from a scene?
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3
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1K
A Aberration with explicit dependance on object coordinates
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4
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1K
Is the Speed of Light Different in a Casimir Vacuum?
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4
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4K
I Visibility when looking down through a Glass Bottom Boat
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4
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984
I How Can I Create a Mirror Reflection Illusion?
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5
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1K
B Reflection from double glazed window
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7
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2K
Unusual circular reflections on our windows before sunset
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1
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950
B Huh? Seeing crisp vitreous floaters while using microscope
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7
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2K
I Newton's rings at an oblique angle of incidence of light
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1
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1K
I Need Help Understanding Echelle Diffraction Gratings
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4
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1K
I Condenser lens retrofit for a lighting application
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24
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2K
B Spherical Lens Model and Proof
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2
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2K
I Question about two interference patterns viewed at infinity
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7
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1K
B Can a magnifying mirror or prism be used somehow as a low-tech reading aid for the visually impaired?
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11
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2K
A Blackbody Radiation and Complex Refractive Index
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6
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1K
I Looking for information on Verity SD100 monochromator unit
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27
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3K
I Why tilting a diffraction grating produces tilted dots
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3
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1K
A Interpretation of a complex angle of refraction
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1
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1K
I The double-slit experiment with a pit in the screen
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33
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2K
A How to observe difference of L/R rotation intensity of CPL
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2
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1K
Increase in numerical aperture leads to a decrease in line width?
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4
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2K
I Ray Tracing Software for Broadband Lasers
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2
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1K
I The detection of the carrier-envelope offset frequency (fCEO) of optical signal
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0
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1K
I Compact Fresnel reflector or diffractive grating?
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3
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2K
I It's still not clear to me what's the limit of light propagation
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6
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2K
I Viewing 1k x 1k slab of desert sand during extreme cold/hot temps?
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7
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2K
I How Can I Build an Effective DIY Helmet-Mounted HUD?
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19
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3K
A Ansys FDTD simulation for phase change due to reflection
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0
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1K
I Interference of two ultra short laser pulses
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15
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2K
I Prism Spectrometer Objective: Optics Question
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9
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2K
I How to narrow a beam to 1 mm diameter?
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1
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2K
B Questions about the Paraxial region for a single spherical surface
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24
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2K
A Collimation of a Gaussian beam
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8
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2K
I Factors that influence depth of field
3
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77
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5K
A Fourier Optics: Why a Plane Wave contributes to just a single point
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13
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2K
I Will cooling or heating a pair of binoculars change the transmitted image?
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3
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1K
I Permittivity (epsilon) change via temperature + optics effect?
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3
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1K
I Microring resonator matrix
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3
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2K
Mirror phenomenon — Concentric halos around eyes in a foggy bathroom
2
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55
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28K
B How would someone see light from something like a flashlight in a tunnel?
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6
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2K
B Did Thomas Young Misinterpret His Double Slit Experiment Results?
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34
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3K
B Horizon and Curvature Observations
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23
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3K
I Laser and nano-holes experiment
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3
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2K
Measure the transmission curve and wavelengths of colored mineral glass
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5
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2K
B How to build a simple polarization filter
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11
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2K
B Light beams and their reflection
2
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64
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4K
B How to Troubleshoot a Lens Focusing Issue with a DIY DSLR Lens
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10
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2K
I What Are Co-Phasal Wave Fronts in Fizeau Interferometry?
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7
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2K
I Why Are Reflected Rays Often Ignored in Lens Studies?
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5
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2K
I Lumens and actual power of luminous flux
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16
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3K
I What travels faster: visible light in water or X-rays in liquid mercury?
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6
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2K
B Why is there a second black ring in Pfund's method with water on the Petri Dish?
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11
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2K
I Does a Fabry Perot cavity charge in discrete steps?
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12
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3K
A Mach Zehnder Interferometer Interference fringes issue
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10
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2K
A Simulating collecting efficency of a LiDAR
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2
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2K
A Question about detector and lens
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12
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2K
B Understanding Corrective Lenses: Examining Reversed Prescriptions
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5
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2K
A About collimation in Czerny-Turner spectrometers
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1
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2K
I Calculating the Raleigh Criterion constant to 99 significant figures
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3
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3K
I Need Help Identifying Old Optic Device
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6
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2K
I Lens Calculations to Focus Light
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10
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3K
I What website/software can draw optics setups like this?
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1
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2K
A Diffraction theory, power density and angle of incidence
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5
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2K
I Help with sourcing a specific type of integrating sphere
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2
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2K
I Measuring reflectance of a non-planar object w/ an integrating sphere
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6
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2K

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