A New Diffuse Optics Emitter for High Visual Diffuse Transmission Density Measurement

Liu, Zilong; Li, Yuxiao; Jiang, Yiqin; Li, Jin; Liu, Ruping; Zhang, Shuguo; Zhang, Qiaoxiang; Chen, Rui

doi:10.3390/app9142774

Cited by 2 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hardcopy images (usually films) are mostly described by optical density [24]. Optical density includes transmission density D T and reflection density D V , and D T is defined as shown in Equation 1, where Φ i is incident diffuse light flux and Φ ι is transmission light flux [25]. Similarly, D V is defined as shown in Equation 2, where Φ r is reflection light flux [25].…”

Section: Methodsmentioning

confidence: 99%

“…Optical density includes transmission density D T and reflection density D V , and D T is defined as shown in Equation 1, where Φ i is incident diffuse light flux and Φ ι is transmission light flux [25]. Similarly, D V is defined as shown in Equation 2, where Φ r is reflection light flux [25]. We have developed a micron-scale printed density film (transmission film and reflection film) as the standard of value transmission [16].…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Digital Grayscale Generation Equipment for Image Display Standardization

Jiang

Liu

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

The standardization of grayscale display is essentially significant for image signal communication, transmission, and terminal reading. The key step of this standardization is establishing a traceable equipment of grayscale. As a relative value, grayscale is transferred to two different absolute values to satisfy different traceability methods, including optical density for hardcopy image and luminance for softcopy. For luminance, a generation equipment is designed to build the relationship between luminance and grayscale. In this work, novel equipment is established using digital light processing (DLP) by time-frequency modulation, and the corresponding uncertainty is analyzed. The experiment result shows that this digital equipment builds the relationship between grayscale and luminance in the range of 0.16-4000 cd/m2. It enables traceable measurement of grayscale to luminance on this equipment with high accuracy and can provide a standardized reference for the display of grayscale images in the fields of medicine, remote sensing, non-destructive testing, etc.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A Digital Grayscale Generation Equipment for Image Display Standardization

Jiang

Liu

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

National standards of optical density units: principles of optical scheme design, constructive and metrological characteristics

MARCHENKO

2024

jour

View full text Add to dashboard Cite

The current state of metrological support for precision optical density measurements is described. In order to analyze the principles of building optical schemes, structural, constructive and functional features of the blocks included in the standards, and metrological characteristics of national standards of optical density units, high-precision optical density measuring instruments developed by national metrological institutes of Russia, Germany, China, and the USA are considered. The equations of optical density measurements are presented, which are a mathematical model of the process of measuring the optical transmittance density of materials. The principles of operation of optical transmittance density unit standards based on light fl fi ration are described. The data of studies of geometric and spectral characteristics of fi national standards of optical density units of four countries are presented, as well as optical schemes and characteristics of standards in the following areas are analyzed: compliance with international standards; features of optical schemes; methods of fi the luminous fl and creating scattered radiation; features of object positioning; type of radiation receiver; metrological characteristics. Information is provided on the participation of national standards in international comparisons. The metrological characteristics of these national standards are summarized in a table. Taking into account and using the considered features of optical schemes, design solutions in conjunction with the metrological characteristics of the described devices contributes to an increase in the level of development while improving the State primary standard of the unit of optical density GET 206-2016.

show abstract

A New Diffuse Optics Emitter for High Visual Diffuse Transmission Density Measurement

Cited by 2 publications

References 32 publications

A Digital Grayscale Generation Equipment for Image Display Standardization

A Digital Grayscale Generation Equipment for Image Display Standardization

National standards of optical density units: principles of optical scheme design, constructive and metrological characteristics

Contact Info

Product

Resources

About