Use of a Stack of Transparent Plates as a Neutral Density Filter

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention relates to the use of a stack of at least two transparent plates as a neutral density filter. These plates are made of a material with specific optical properties, including high transparency, controlled thickness, and a broad wavelength transmission. The stack can handle high light intensities without being damaged, making it suitable as an optical filter with precise and consistent attenuation across a wide range of light wavelengths.

Use CasesContent extracted from patent full text and abstract with AI.

• Camera lens filters for photography and videography to reduce light intensity without affecting color balance
• Optical instrumentation that requires controlled light attenuation, such as spectrometers or scientific measuring devices
• Laser systems that need stable and durable neutral density filters for beam intensity control
• Microscopy and biomedical imaging to manage the amount of light reaching delicate samples
• Display technologies or projectors needing graded light filtering

BenefitsContent extracted from patent full text and abstract with AI.

• Ensures broad and even light attenuation (neutral density) without color distortion
• Can withstand high-intensity light sources or powerful lasers without damage
• Provides precise control over the filter’s transmission due to controlled plate thickness and spacing
• High optical clarity and minimal distortion due to material specifications
• Can be adapted to various optical systems due to flexibility in sizing and configuration

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

Die Erfindung betrifft die Verwendung eines Stapels von mindestens 2 transparenten Platten als Neutraldichtefilter. Insbesondere sind die transparenten Platten gekennzeichnet dadurch ,dass sie aus einem Material bestehen, das einen Extinktionskoeffizienten k ≤ 2e, eine Abbe-Zahl v> 30, eine Transmission T ≥ 0,85 und eine Dicke in einem Bereich zwischen 10 µm ≤ t ≤ 6000 µm, mit einer Standardabweichung der Dicke über die Ausdehnung der Glasplatte von Δt ≤ 500 µm und einem Abstand d zwischen den Glasplatten in einem Bereich zwischen 1 µm ≤ d ≤ 1000 µm aufweist und die Transmission breitbandig ist. Die Zerstörschwelle des verwendeten Stapels ist dabei größer 30 W/cm, insbesondere aber auch größer als 100 W/cm