monodavids
Laser Light in Digital Holography
A laser is employed as the source light to an Optical Encryption system which uses a digital holographic setup. In this photo the 532 nanometre green laser is deflected from the system and shone straight into the camera. The grainy texture of the light in this image is a consequence of an optical phenomenon known as speckle. Speckle results from the random constructive and destructive interference of light waves, which have different phases. It occurs when laser light reflects off any surface with deviations that are larger then the wavelength of the light.
This photo also contains other optical aberrations and diffraction rings. These are mainly caused by a combination of the square and circular apertures used in the digital holographic setup. Other causes can be the imperfections in the optical equipment (including the camera), dust particles, both in the air and on the glass lenses. The small hexagonal shapes emanating from the light source are due to “lens flare”, caused by light reflecting inside the camera’s lens system.
Laser Light in Digital Holography
A laser is employed as the source light to an Optical Encryption system which uses a digital holographic setup. In this photo the 532 nanometre green laser is deflected from the system and shone straight into the camera. The grainy texture of the light in this image is a consequence of an optical phenomenon known as speckle. Speckle results from the random constructive and destructive interference of light waves, which have different phases. It occurs when laser light reflects off any surface with deviations that are larger then the wavelength of the light.
This photo also contains other optical aberrations and diffraction rings. These are mainly caused by a combination of the square and circular apertures used in the digital holographic setup. Other causes can be the imperfections in the optical equipment (including the camera), dust particles, both in the air and on the glass lenses. The small hexagonal shapes emanating from the light source are due to “lens flare”, caused by light reflecting inside the camera’s lens system.