This paper examines the light transmission, reflection, and scattering characteristics of military helmet visors used for see-through helmet-mounted displays (HMDs). HMDs used for the within-visual-range counter-air mission normally use the inner surface of the helmet visor to reflect the HMD image to the pilot's eye. This approach is popular because it minimizes any optical structures that interfere with the pilot's vision, while also maximizing see-through to the ambient scene. In most cases, a reflective coating, which increases the cost of the helmet visor significantly, must be applied in the inner surfaces in order to achieve enough contrast between the HMD image and the external light passing through the visor. Recently, with the development of high luminance miniature cathode-ray-tubes, it has been possible to eliminate the reflective coatings on neutral density helmet visors having a see-through range of 13-35%. This paper examines the light management properties of both types of visors. The paper stresses measurement techniques that produce repeatable results and what these results might imply about visual performance under operational lighting conditions.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Measurement of military helmet- and head-mounted display (HMD) visor optical properties


    Beteiligte:
    Kocian, D.F. (Autor:in) / Task, H. (Autor:in)


    Erscheinungsdatum :

    2000


    Format / Umfang :

    13 Seiten, 2 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Measurement of military helmet- and head-mounted display (HMD) visor optical properties [4021-13]

    Kocian, D. F. / Task, H. L. / SPIE | British Library Conference Proceedings | 2000




    `Visor projected helmet mounted displays technology and applications'

    Cameron, A. / Electrical Research Association | British Library Conference Proceedings | 1997


    STEERABLE RETICLE FOR VISOR PROJECTED HELMET MOUNTED DISPLAYS

    FOOTE BOBBY D / HAWK ERIN M / RIVERA JOSH et al. | Europäisches Patentamt | 2020

    Freier Zugriff