Variable light-filtering device with a redox compound which functions as its own electrolyte
    37.
    发明授权
    Variable light-filtering device with a redox compound which functions as its own electrolyte 失效
    具有与其电解质功能有关的氧化还原复合物的可变光过滤装置

    公开(公告)号:US3652149A

    公开(公告)日:1972-03-28

    申请号:US3652149D

    申请日:1969-09-02

    Applicant: POLAROID CORP

    Inventor: ROGERS HOWARD G

    Abstract: This invention relates to light filters employing redox compounds that are substantially light-transmitting in their oxidized state and capable of forming a stable colored free radical upon the addition of electrons. The colored free radical formed in response to the flow of electric current renders the device light-absorbing. To restore the original lighttransmitting properties, the colored free radical may be readily reoxidized, for example, by reversing the direction of current flow.

    Abstract translation: 本发明涉及采用氧化还原化合物的光过滤器,该氧化还原化合物在氧化状态下基本上是透光的,并且能够在加入电子时形成稳定着色的自由基。 响应于电流流动形成的着色自由基使得器件吸光。 为了恢复原始的透光特性,着色的自由基可以容易地再氧化,例如通过反转电流的方向。

    Pleochroic spectacles
    38.
    发明授权
    Pleochroic spectacles 失效
    PLEOCHROIC SPECTACLES

    公开(公告)号:US3617114A

    公开(公告)日:1971-11-02

    申请号:US3617114D

    申请日:1970-02-24

    Applicant: POLAROID CORP

    Inventor: ROGERS HOWARD G

    CPC classification number: G02C7/12

    Abstract: Polarized prescription spectacles are furnished with lenses ground and polished from pleochroic crystals. Pleochroic crystals are readily polished to the contours required on ophthalmic lenses. The crystal is oriented with its principal absorption axis horizontal and at right angles to the lens axis. Sunglasses can be fitted with certain pleochroic crystals to reduce solar intensity for the wearer as well as glare from terrestrial sources.

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