Extended holographic wave front printer setup employing two spatial light modulators

Hofmann, Johannes; Fieß, Reinhold; Kick, Moritz; Stork, Wilhelm

doi:10.1117/12.2520064

Cited by 5 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Current approaches for printing matrix holograms focus on increasing the quality of image reconstruction by decreasing the pixel size of the matrix or overlapping of the matrix elements [15,16]. Hofmann et al are printing holographic diffusers [17] or micromirror arrays [18] utilizing a holographic printer with two SLMs allowing for arbitrary wavefronts being depicted onto each side of the holographic film. Yet the reconstruction of these vHOE is done with collimated light or laser beams, which requires preshaping of the lightsource, especially when LEDs are used for illumination at small distances.…”

Section: Discussionmentioning

confidence: 99%

Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications

Giehl¹,

Hiller²,

Neumann

2020

Advanced Optical Technologies

View full text Add to dashboard Cite

Holograms have found their use as optical elements in a variety of applications. Yet using them with incoherent and divergent lightsources like LEDs proves difficult, as their characteristics need to be simulated by lasers during manufacturing to get a correct reconstruction of the desired light distribution. We present a new setup to allow for a high flexibility during the manufacturing process, which is able to produce volume holographic cell arrays (VCAs) that can be illuminated directly with uncollimated LEDs. Results are presented for the case of reflection holograms.

show abstract

Section: Discussionmentioning

confidence: 99%

Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications

Giehl¹,

Hiller²,

Neumann

2020

Advanced Optical Technologies

View full text Add to dashboard Cite

show abstract

“…The availability of SLMs with ever decreasing pixel size is decisive to enlarge the angular span of the object beam in those printers [89]. Even to use SLMs in both reference and object beam is already demonstrated especially using a photopolymer recording medium [90]. It is more critical to establish mass replication as it needs more investment and the dedication of the latter to a new industry and new business.…”

Section: Towards a Value Chain For A Volume Hologram Industrymentioning

confidence: 99%

Roadmap on holography

Sheridan¹,

Kostuk²,

Gil³

et al. 2020

J. Opt.

View full text Add to dashboard Cite

“…Diffractive elements based on volume holograms are characterized by a high angle and wavelength selectivity due to their characteristic Bragg gratings [11,12]. As a result, volume holograms achieve high diffraction efficiencies for reconstruction in Bragg configuration paired with excellent transmittance properties for deviating replay configurations [11,13,14]. In addition to that, holographic wave front printing has proven itself to be a feasible technology to realize holograms with complex optical functions, i.e., to fabricate vHOE-based freeform optics as demonstrated by Jang et al [15].…”

Section: Introductionmentioning

confidence: 99%

Multiplexed Holographic Combiner with Extended Eye Box Fabricated by Wave Front Printing

et al. 2022

Self Cite

View full text Add to dashboard Cite

We present an array-based volume holographic optical element (vHOE) recorded as an optical combiner for novel display applications such as smart glasses. The vHOE performs multiple, complex optical functions in the form of large off-axis to on-axis wave front transformations and an extended eye box implemented in the form of two distinct vertex points with red and green chromatic functions. The holographic combiner is fabricated by our extended immersion-based wave front printing setup, which provides extensive prototyping capabilities due to independent wave front modulation and large possible off-axis recording angles, enabling vHOEs in reflection with a wide range of different recording configurations. The presented vHOE is build up as an array of sub-holograms, where each element is recorded with individual optical functions. We introduce a design and fabrication method to combine two angular and two spectral functions in the volume grating of individual sub-holograms, demonstrating complex holographic elements with four multiplexed optical functions comprised in a single layer of photopolymer film. The introduced design and fabrication process allows the precise tuning of the vHOE’s diffractive properties to achieve well-balanced diffraction efficiencies and angular distributions between individual multiplexed functions.

show abstract

Extended holographic wave front printer setup employing two spatial light modulators

Cited by 5 publications

References 3 publications

Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications

Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications

Roadmap on holography

Multiplexed Holographic Combiner with Extended Eye Box Fabricated by Wave Front Printing

Contact Info

Product

Resources

About