Abstract:
The invention provides a light module (1) arranged to produce a beam of light (25) with a scattering pattern that is electrically variable. The module comprises a light source (2) arranged to provide a beam of light (5); and an electrically adjustable optical element (300) arranged to adjust the beam of light (5) from light source (2). The adjustable optical element comprises a first cell (10) with a first liquid crystal gel (11); optionally a polarization rotator (30); a second cell (20) with a second liquid crystal gel (21); and a unit 40 for applying a voltage across at least one of the first and second cells (10,20). Especially, the light module (1) provides a beam of light (25) with an anisotropic light distribution.
Abstract:
The invention relates to a low-pressure gas discharge lamp which includes at least one discharge vessel and at least two capacitive coupling-in structures and operates at an operating frequency f. In order to achieve a better efficiency in combination with a small structural volume, a high luminous flux, a low operating voltage, a low electromagnetic emission, a high resistance against switching transients and a long service life for the low-pressure gas discharge lamp, it is proposed to form each capacitive coupling-in structure from at least one dielectric having a thickness d and a dielectric constant ∈, each dielectric being subject to the condition d/(f.∈)
Abstract:
The invention relates to a gas discharge lamp with a gas discharge vessel filled with a filling gas with a filling gas pressure p and at least one capacitive excitation structure. To improve the luminous efficacy of the gas discharge lamp, it is suggested that an electrode of a dielectric material forms at least one capacitive excitation structure, which electrode is connected to the gas discharge vessel and encloses at least one hollow space with a surface area A and a volume V, for which it is true that p·V/A
Abstract translation:本发明涉及一种气体放电灯,其具有填充有填充气体压力p和至少一个电容激励结构的填充气体的气体放电容器。 为了提高气体放电灯的发光效率,建议介电材料的电极形成至少一个电容激励结构,该电极连接到气体放电容器并且包围至少一个具有表面积A的中空空间 和体积V,其中pV / A <10cmTorr是真的。 根据本发明的这种电介质或电容电极被成形为使得其具有中空空间,除了与气体放电容器的连通以真空密封的方式封闭。 它在电极内部具有表面积A并且包围体积V.中空空间的尺寸使得p.V / A <10cmTorr,填充气体压力p以Torr给出。