Apostilb Converter
Convert Apostilb to Candela Square Meter and more • 19 conversions
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Unit Explanations
Apostilbab
Source UnitThe apostilb (symbol: ab) is a non-SI unit of luminance, defined as the luminance of a surface that emits or reflects one lumen per square meter. It quantifies the intensity of visible light emitted from a surface in a specific direction, taking into account the human eye's sensitivity to different wavelengths of light. The apostilb is often used in fields where precise measurements of light and visibility are crucial, such as photography, cinematography, and various lighting applications. With a practical focus on human perception and visual acuity, the apostilb offers a unique perspective on how light interacts with surfaces and the impact it has on visibility and aesthetics.
Current Use
The apostilb is primarily used in the fields of lighting design, photography, cinematography, automotive lighting, and display technology. It offers a relatable measurement for professionals concerned with the quality and intensity of light. In the film industry, for instance, cinematographers use apostilbs to control lighting setups, ensuring that scenes are adequately illuminated for the camera's sensor. In architecture and interior design, the apostilb aids in designing spaces with optimal lighting conditions. Additionally, countries that follow photometric standards, including the USA and many European nations, utilize the apostilb within their lighting regulations and guidelines. The apostilb is essential in industries where precise light measurement directly impacts safety and visual comfort.
Fun Fact
The apostilb is not widely used outside specialized fields, making it a unique unit.
Candela per Square Metercd/m²
Target UnitThe candela per square meter (cd/m²), commonly referred to as 'nits', is a derived unit of luminance in the International System of Units (SI). It quantifies the luminous intensity emitted by a surface in a given direction per unit area. Specifically, it defines how much light is emitted from a surface that has a luminous intensity of one candela and covers an area of one square meter. This unit is crucial in fields such as photography, display technology, and lighting design, as it allows for the assessment of brightness and visual comfort. The concept of luminance is fundamental in understanding how light interacts with surfaces and affects human perception. It plays a vital role in optimizing lighting conditions and evaluating the performance of displays and lighting fixtures in various environments.
Current Use
The candela per square meter is widely used across various industries, including electronics, automotive, architecture, and photography. In the electronics industry, it is crucial for evaluating display brightness in televisions, computer monitors, and smartphones, influencing consumer choices and design standards. In the automotive sector, luminance standards ensure that dashboard displays and exterior lights meet safety regulations. Architectural lighting design relies on cd/m² to create visually appealing environments while ensuring adequate illumination levels. In photography, achieving the correct luminance is essential for proper exposure and image quality. Countries such as the United States, Germany, and Japan have adopted this unit in their standards for light measurement, contributing to a global understanding of luminance.
Fun Fact
The term 'nit' is derived from the Latin word 'nitere', meaning 'to shine'.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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Apostilb
luminance • Non-SI
Definition
The apostilb (symbol: ab) is a non-SI unit of luminance, defined as the luminance of a surface that emits or reflects one lumen per square meter. It quantifies the intensity of visible light emitted from a surface in a specific direction, taking into account the human eye's sensitivity to different wavelengths of light. The apostilb is often used in fields where precise measurements of light and visibility are crucial, such as photography, cinematography, and various lighting applications. With a practical focus on human perception and visual acuity, the apostilb offers a unique perspective on how light interacts with surfaces and the impact it has on visibility and aesthetics.
History & Origin
The apostilb was introduced in the mid-20th century as a part of efforts to standardize measurements related to light and visibility. The term is closely associated with the work of researchers who aimed to create a coherent system of photometric units that would better represent how light is perceived by the human eye. Prior to its introduction, luminance measurements were often inconsistent and varied widely between different scientific and engineering applications. The apostilb filled this gap by providing a clear and precise measurement that could be universally understood and applied in various fields.
Etymology: The term 'apostilb' derives from the Greek word 'apo', meaning 'from', and 'stilb', which comes from the Greek word 'stilbos', meaning 'to shine'. This reflects the unit's focus on the brightness of light as perceived from a surface.
Current Use
The apostilb is primarily used in the fields of lighting design, photography, cinematography, automotive lighting, and display technology. It offers a relatable measurement for professionals concerned with the quality and intensity of light. In the film industry, for instance, cinematographers use apostilbs to control lighting setups, ensuring that scenes are adequately illuminated for the camera's sensor. In architecture and interior design, the apostilb aids in designing spaces with optimal lighting conditions. Additionally, countries that follow photometric standards, including the USA and many European nations, utilize the apostilb within their lighting regulations and guidelines. The apostilb is essential in industries where precise light measurement directly impacts safety and visual comfort.
💡 Fun Facts
- •The apostilb is not widely used outside specialized fields, making it a unique unit.
- •The apostilb is named after the Greek word for 'shine', linking it closely to human perception.
- •In practical applications, the apostilb helps prevent eye strain by guiding proper lighting levels.
📏 Real-World Examples
🔗 Related Units
Candela per Square Meter
luminance • Non-SI
Definition
The candela per square meter (cd/m²), commonly referred to as 'nits', is a derived unit of luminance in the International System of Units (SI). It quantifies the luminous intensity emitted by a surface in a given direction per unit area. Specifically, it defines how much light is emitted from a surface that has a luminous intensity of one candela and covers an area of one square meter. This unit is crucial in fields such as photography, display technology, and lighting design, as it allows for the assessment of brightness and visual comfort. The concept of luminance is fundamental in understanding how light interacts with surfaces and affects human perception. It plays a vital role in optimizing lighting conditions and evaluating the performance of displays and lighting fixtures in various environments.
History & Origin
The candela per square meter originated from the need to measure light's visual impact on surfaces. In the early 20th century, the understanding of light properties and their effects on human vision was still developing. The International Commission on Illumination (CIE) conducted extensive research to define standards for various light measurements. The candela, established as the SI base unit of luminous intensity in 1979, became integral to this system. The derivation of luminance from the candela marked a significant step in quantifying light's interaction with surfaces, thereby enhancing the precision of lighting design and evaluation.
Etymology: The term 'candela' is derived from the Latin word for 'candle', reflecting the historical use of candles as a standard light source.
Current Use
The candela per square meter is widely used across various industries, including electronics, automotive, architecture, and photography. In the electronics industry, it is crucial for evaluating display brightness in televisions, computer monitors, and smartphones, influencing consumer choices and design standards. In the automotive sector, luminance standards ensure that dashboard displays and exterior lights meet safety regulations. Architectural lighting design relies on cd/m² to create visually appealing environments while ensuring adequate illumination levels. In photography, achieving the correct luminance is essential for proper exposure and image quality. Countries such as the United States, Germany, and Japan have adopted this unit in their standards for light measurement, contributing to a global understanding of luminance.
💡 Fun Facts
- •The term 'nit' is derived from the Latin word 'nitere', meaning 'to shine'.
- •A common household candle emits approximately 1 candela of light intensity.
- •In 2020, the global market for display luminance testing equipment was estimated to exceed $1 billion.
📏 Real-World Examples
🔗 Related Units
Related Luminance Conversions
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Frequently Asked Questions
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What is the formula for to conversion?▼
The formula is: = × 1. This conversion factor is based on international standards.
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