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HOLOGRAPHIC LENS [6 records]

Record 1 2023-12-14

English

Subject field(s)
  • Optics
  • Computer Graphics
  • Photography
CONT

If a plane-wave reference is used for recording and for reconstruction, then the reconstructed image will coincide with the magnified image of the object in amplitude, although the phase will contain the curvature due to the imaging lens. Alternatively, holographic interference of the object and the plane-wave reference can be formed first and its magnified image projected near the hologram plane...

French

Domaine(s)
  • Optique
  • Infographie
  • Photographie

Spanish

Save record 1

Record 2 2021-09-08

English

Subject field(s)
  • Optics
  • Computer Graphics
  • Photography
CONT

The production of cylindrical holographic stereograms, or multiplex holograms, requires the use of a large, low [f number] cylindrical lens to form a line image on the holographic film.

French

Domaine(s)
  • Optique
  • Infographie
  • Photographie

Spanish

Save record 2

Record 3 2017-03-22

English

Subject field(s)
  • Scientific Instruments
  • Remote Sensing
CONT

Each individual spectrometer is relatively simple and small, consisting of only a lens, slit, concave holographic grating, and photodiode array detector.

French

Domaine(s)
  • Instruments scientifiques
  • Télédétection

Spanish

Save record 3

Record 4 2006-11-11

English

Subject field(s)
  • Target Acquisition
  • Small Arms
CONT

Holographic sights have a large non-magnified lens with a reflector dot in the middle.... A firer keeps both eyes open while lining up the reflector dot with the target. The bullet goes wherever the dot is pointing.

French

Domaine(s)
  • Acquisition d'objectif
  • Armes légères

Spanish

Save record 4

Record 5 1991-02-11

English

Subject field(s)
  • Computer Graphics
  • Optical Instruments

French

Domaine(s)
  • Infographie
  • Instruments d'optique
CONT

La lentille holographique joue le rôle d'un combinateur qui superpose deux images : l'image (nocturne) intensifiée et l'image (diurne) directe.

Spanish

Save record 5

Record 6 1981-11-24

English

Subject field(s)
  • Aeroindustry
CONT

With the D-HUD, a form of holographic recording is used to produce a thin-film lens, covering the whole area of the curved combining glass.(...) This thin-film lens is produced by the use of a laser which records, photographically, a form of diffraction grating within a layer of gelatin which is coated onto the curved combining glass. After processing, the thin film lens is covered by a second glass layer to form a sandwich, with the "lens" formed by changes in the refractive index of the gelatin layer, providing the effect of a diffraction grating.

French

Domaine(s)
  • Constructions aéronautiques
CONT

Ce nouveau collimateur fait appel à une forme d'enregistrement holographique qui crée une lentille à couche mince recouvrant toute la surface de l'optique de mélange. (...) Cette lentille à couche mince est créée par un laser qui enregistre photographiquement une sorte de réseau de diffraction dans une couche de gélatine appliquée sur l'optique de mélange, elle-même recouverte d'une seconde couche de verre formant sandwich.

Spanish

Save record 6

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