What is a holographic lens?
holography or art of creating three -dimensional (3D) images generally requires at least one double concave lens. This shape of the holographic lens is necessary to handle the light source to adequately illuminate the object from more than one direction and at the same time illuminate the photographic plate. Creating basic 3D holograms generally requires to have a holographic lens, a laser beam, equipment holders and a photographic plate located between two pieces of glass. The size and overall shape of the lens used depend on each project.
The double concave shape of the holographic lens means that the edges are stronger than the center. Looking at the lens to the side, the shape appears similar to the letter of the upper case "I." Some lenses are highly polished on both sides with smoothed edges. Other lenses can be matt on one or both sides. The holographic lens can be round, rectangular or square, but has concave surfaces on both sides.
when and a collimated laser beam pIt roles with a holographic lens, the light emitted on the other side diffuses or fans out, creates a wide but even beam of light. One beam usually illuminates the space up to the front of the building. The space around the building must also be illuminated from more than one angle to form a 3D display. If the photographic board does not lie in line with the object, some holographic methods also redirect light to the plate lighting.
by distributing beams, multiple lenses or mirrors, different angles of the subject receive light simultaneously. The part of the beam generally illuminates the front of the building, while the redirected part of the beam illuminates the space to the side or on the back of the subject. Strategic fishing of lenses or mirrors reflects and re -creates these current pictures on a glass sandwich that holds a photographic film.
Optical companies produce holographic lenses in sizes in0.5 -inch diameter (12 millimeters) to a diameter of over 3 inches (75 millimeters). The lenses also vary in thickness and focal lengths, which is a distance from the converged, focused beam to the lens. The larger the lens, the greater the distance of the focus and the wider the angle of the scattered light. The type of holographic lens used depends on the size of the available workspace, the strength of the laser beam and the size of the hologram that decides to create.