Optics Forum

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Is the Speed of Light Different in a Casimir Vacuum?
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I Visibility when looking down through a Glass Bottom Boat
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4
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173
A Optics: how gather and align light from a scene?
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100
A Aberration with explicit dependance on object coordinates
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3
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242
I How Can I Create a Mirror Reflection Illusion?
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5
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208
B Reflection from double glazed window
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7
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393
Unusual circular reflections on our windows before sunset
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1
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262
B Huh? Seeing crisp vitreous floaters while using microscope
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7
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562
I Newton's rings at an oblique angle of incidence of light
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301
I Need Help Understanding Echelle Diffraction Gratings
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4
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379
I Condenser lens retrofit for a lighting application
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24
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602
B Spherical Lens Model and Proof
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2
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I Question about two interference patterns viewed at infinity
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7
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566
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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753
A Blackbody Radiation and Complex Refractive Index
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6
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500
I Looking for information on Verity SD100 monochromator unit
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27
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2K
I Why tilting a diffraction grating produces tilted dots
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3
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502
A Interpretation of a complex angle of refraction
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442
I The double-slit experiment with a pit in the screen
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1K
A How to observe difference of L/R rotation intensity of CPL
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585
Increase in numerical aperture leads to a decrease in line width?
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4
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779
I Ray Tracing Software for Broadband Lasers
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2
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649
I The detection of the carrier-envelope offset frequency (fCEO) of optical signal
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632
I Compact Fresnel reflector or diffractive grating?
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3
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690
I It's still not clear to me what's the limit of light propagation
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1K
I Viewing 1k x 1k slab of desert sand during extreme cold/hot temps?
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7
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935
I How Can I Build an Effective DIY Helmet-Mounted HUD?
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19
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1K
A Ansys FDTD simulation for phase change due to reflection
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715
I Interference of two ultra short laser pulses
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15
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I Prism Spectrometer Objective: Optics Question
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I How to narrow a beam to 1 mm diameter?
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873
B Questions about the Paraxial region for a single spherical surface
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24
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A Collimation of a Gaussian beam
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8
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I Factors that influence depth of field
3
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A Fourier Optics: Why a Plane Wave contributes to just a single point
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13
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1K
I Will cooling or heating a pair of binoculars change the transmitted image?
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3
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742
I Permittivity (epsilon) change via temperature + optics effect?
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3
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812
I Explanation for homemade digital microscope's optical systems?
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3
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1K
I Microring resonator matrix
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3
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938
Mirror phenomenon — Concentric halos around eyes in a foggy bathroom
2
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55
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24K
B How would someone see light from something like a flashlight in a tunnel?
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6
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979
B Did Thomas Young Misinterpret His Double Slit Experiment Results?
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34
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2K
B Horizon and Curvature Observations
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23
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I Laser and nano-holes experiment
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3
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Measure the transmission curve and wavelengths of colored mineral glass
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5
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1K
B How to build a simple polarization filter
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11
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1K
B Light beams and their reflection
2
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64
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B How to Troubleshoot a Lens Focusing Issue with a DIY DSLR Lens
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10
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I Exploring Co-Phasal Wave Fronts in Fizeau Interferometry
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7
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I Why Are Reflected Rays Often Ignored in Lens Studies?
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5
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1K
I Lumens and actual power of luminous flux
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16
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2K
I What travels faster: visible light in water or X-rays in liquid mercury?
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6
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1K
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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2K
A Mach Zehnder Interferometer Interference fringes issue
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10
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A Simulating collecting efficency of a LiDAR
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2
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1K
A Question about detector and lens
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12
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1K
B Understanding Corrective Lenses: Examining Reversed Prescriptions
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5
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A About collimation in Czerny-Turner spectrometers
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1
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I Calculating the Raleigh Criterion constant to 99 significant figures
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3
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2K
I Need Help Identifying Old Optic Device
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6
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I Lens Calculations to Focus Light
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10
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I What website/software can draw optics setups like this?
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1
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1K
I Recreating Spectral Response from 6-Channel Color Sensor
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A Diffraction theory, power density and angle of incidence
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5
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I Help with sourcing a specific type of integrating sphere
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2
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I Measuring reflectance of a non-planar object w/ an integrating sphere
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6
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I Creating a wavelength selectable light source with diffraction grating
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2
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I What happens if I place light sources on the plane perpendicular to the principle axis of cylindrical lens?
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How to find the orientation of polarization of a polarizer
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6
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I Can n-slit interference produce subwavelength stripes?
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6
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B (Huygens) Irving Giant Pinhole variation: Extend it with a 70 mm tube?
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4
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I How Does Diffraction Influence Shadows and Optical Observations?
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3
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I Optical Effect: curved light source when seen through the bus window
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5
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2K
I Can an Aspheric Lens Narrow the FOV for Motion Detection Systems?
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I How is IR ink able to be seen with specialized filters?
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3
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I Can I Use Additional Wavelengths for a More Advanced Hue Calculation?
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19
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I Optical pumping vs Rabi cycle - what is the difference between their conditions?
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5
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B Huygens Question - Using a Pinhole Box in the Giant Pinhole Irvine
3
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70
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I How different is a calcite crystal from a polarizer?
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3
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I Reflection, refraction, and Snell's law
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23
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I How Do Different Wavefront Shapes Appear to the Human Eye?
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28
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Define the polarization in TE/TM modes
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4
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I Sine laws of spherical singlets
3
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72
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Looking for trigonometric ray tracing software for optics
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22
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A Spherical aberration in Biconvex lens
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9
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A Calculating the optical depth of an inhomogeous gas
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I Sagnac Interferometer (Fiber Gyro)
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2K
I Automatic double lens glasses?
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3
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I My spectacles defy the laws of physics
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13
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I Tilted plane wave through a 2 lens system
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5
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A Stimulated emission/absorption - which equations act on external targets?
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2
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B Scattering of light by dust particles
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4
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I Stimulated Emission & Emitted photon direction
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B Why are light waves depicted as lines, circles, and sinusoids?
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18
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B Is this material is good for fiber optics and who would buy it?
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2
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B Scattering of light inside a room
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22
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A How is it possible to measure an IR LED source in mW/sr?
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16
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I How to Measure Magnification of a Lens System with Liquid Surface
2
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40
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A What exactly is deconvolution doing?
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13
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