Traditional Culture Encyclopedia - Photography and portraiture - Explanation of optical terms?
Explanation of optical terms?
The meaning of optics
Optics * * * * is a physical discipline that studies the behavior and properties of light, electromagnetic waves and the interaction between light and matter. The origin of optics has been recorded in the west for a long time. Traditional optics only studies visible light, but modern optics has expanded its scope to study electromagnetic waves in all bands. As a real science, optics should be counted from the time when the laws of reflection and refraction were established, which laid the foundation of geometric optics.
The origin of optics has been recorded in the west for a long time. Euclid, about 330 ~ 260 BC, * * * Catoptrica * * studied the reflection of light; * * * scholar Al Al Hazen ***AI-Hazen, 965 ~ 1038 * * wrote a book "Encyclopedia of Optics" to discuss many optical phenomena.
As a real science, optics should be counted from the time when the laws of reflection and refraction were established, which laid the foundation of geometric optics. /kloc-in the 0/7th century, the application of telescopes and microscopes greatly promoted the development of geometric optics.
The nature of light * * * Physical optics * * is also an important topic in optical research. Particle theory regards light as composed of particles, and thinks that these particles fly in a straight line according to mechanical laws, so light has the property of straight line propagation. /kloc-Before the 0/9th century, particle theory was popular. However, with the deepening of optical research, people have found many phenomena that cannot be explained by straightness, such as interference and diffraction, which can be easily explained by the fluctuation of light. So the optical wave theory has gained the upper hand again. The debate between the two theories constitutes a red line in the history of optical development.
In a narrow sense, optics is a science about light and vision. The word *** optics * * was only used in the early days for things related to eyes and eyesight. Today, optics is in a broad sense. It studies the generation, propagation, reception and display of electromagnetic radiation and its interaction with matter in a wide wavelength range from microwave, infrared, visible light, ultraviolet to X-ray. Optics is an important part of physics and a subject closely related to other applied technologies.
Appreciation of optical sentence-making
1 Only after optical microscope and more powerful electron microscope came out one after another did people "see the end of autumn" deservedly.
We should develop in an all-round way, not only in study, but also in sports.
I study math as well as Chinese.
In order to understand the specific meaning of these parts, consider an optical character recognition system, which scans the symbols on paper and converts them into 3-digit decimal numbers.
The number, size and distribution characteristics of nonmetallic inclusions in different parts of hard wire steels with different diameters were analyzed by optical microscope.
With this optical instrument, we can distinguish 0.025 micron microwave.
This paper studies the image recognition technology based on optical correlation processing.
Human eye model and corneal model are important research objects in the field of visual optics and ophthalmology.
This paper introduces a simple digital recognition method for reading screen of optical dividing head.
10 then I found that the learning environment of the tourism department of Shixin University is very diverse.
1 1 Based on scalar diffraction theory and Fourier optics, a microscopic imaging model is developed, which considers the optical axis of the microscope objective and the inclination angle of the observation plane.
In 12, a method of accurately measuring facet angle by using optical superheterodyne method with longitudinal Zeeman dual-frequency stabilized frequency laser as light source is proposed.
13 through infrared optical measurement, researchers can prove that the media secreted by mast cells and intestinal chromaffin cells can directly activate nerve cells in the intestine.
14 An optical bistable experimental device with optical fiber structure is proposed, which uses the photoelastic effect of timely optical fiber to realize the calendering modulation of za ojv and complete the bistable experiment.
15 atoms behave like quantum optical transistors, which can continuously control the flow of light into the optical cavity.
At the same time, the ray effect of spherical harmonic function method decreases with the increase of optical thickness.
17 company is engaged in the research, production and sales of ultraviolet glass materials.
18 proposes to attach great importance to architectural optics education and strengthen its postgraduate education.
19 in this paper, the process of laser continuous oscillation is discussed by using the steady-state solution of optical Bloch equation.
Optical system includes two parts: the formation of optical image and the projection of optical image.
2 1 with the comprehensive maintenance and after-sales service of David company, customers are not only full of confidence but also full of praise when using David cameras and optical products!
In order to save rare and expensive Iceland spar crystal material and improve the transmittance of polarizing prism as much as possible, a method of combining Iceland spar crystal with optical glass was designed.
Angle measurement is an important part of geometric measurement technology, and angle measurement technology has developed from early mechanical and electromagnetic to optical angle measurement.
The efficiency of standard droplets is defined, and the formation and shape of droplets are monitored by an optical zoom system connected with developer and flash velocimeter.
Although it looks like a SLR and actually uses a fixed lens that cannot be scaled, S8000fd is the first digital camera in the industry with an optical zoom fixed lens of 18 times.
All models have built-in air purification buckles, which can conveniently and effectively maintain optical cleanliness in harsh hunger environment.
In addition to hue, lightness and saturation, the visual appearance of natural teeth has many secondary optical characteristics: translucency, turbidity, halo, surface luster and fluorescence, among which translucency is the most important.
Electronic panel. This is the optical image of the whole electronic panel constructed by active matrix nanowire circuit.
Selected optical sentences
1. However, this all-fiber Q-switched device has small welding loss with optical fiber, which overcomes the characteristic of high insertion loss when the bulk light modulator is docked with optical fiber.
2. In this paper, the astigmatism cavity of cylindrical lens is studied by matrix optics method.
3. According to the characteristics of spatial filtering, two pairs of gratings are added to the common single slit to make it a practical optical filter.
4. This design method is not only convenient for uniaxial gradient index lenses, but also convenient for optical systems including uniform dielectric elements.
5. This product has optical characteristics. If we design its structure reasonably, lead sulfate will be widely used in scintillation materials.
6. Optical Character Recognition Machine is a scanner that converts typed or printed fonts into digital data.
7. Firstly, this paper reviews the characteristics of color optics and human color vision.
8. Nebulae get their name because their optical images show that dust blurs the luminous gas of some nebulae into arched features reminiscent of people.
9. Firstly, an optical fringe pattern with sinusoidal intensity distribution is generated by a computer program and projected onto the surface of the object to be measured by a liquid crystal projector.
10. What is amblyopia? Can you correct it with optical lenses?
1 1. Themes are selected from all levels, including: optics, psychophysics, computer graphics and computer vision.
12. As shown in the figure, the wavelength conversion element includes phosphor particles embedded in a transparent film attached to an optical concentrator.
13. Optical CT technology is an important product of the combination of optical measurement technology and chromatography technology. It is a brand-new high-precision nondestructive testing technology.
14. Through the experimental analysis, the types of polishing solutions suitable for different kinds of optical glass are found, thus effectively improving the polishing efficiency and improving the polishing surface quality.
15. Results The fingerprint was clear. Compared with directional reflection and dark field photography, polarized light photography is obviously superior to other optical methods.
16. The nonlinear optical properties of semiconductor materials have good application value in the field of optoelectronic devices, such as all-optical switches, optical limiters, optical couplers and so on.
17. The self-absorption characteristics of cyclotron synchrotron radiation generated by high-energy electrons are studied in detail, and its optical thickness is calculated by using the radio microwave source model of magnetic dipole field.
18. The physical optical simulator can simulate the mirror echo, but this simulation does not include the surface traveling wave effect and edge diffraction effect.
19. Optically active cyanohydrin is an important intermediate for synthesizing a large number of pharmaceutical and pesticide products.
20. The characteristics, difficulties and design results of the optical system for digital color printing are described.
22. Demonstrate its optical imaging principle with hyperboloid mirror.
23. Using the double-fold model, the elastic scattering differential cross section is fitted, and the elastic scattering optical potential of the missile-target system at this energy is obtained.
24. In recent years, in the field of optics, the research on the orbital angular momentum of light beams has attracted extensive attention.
25. This paper discusses the mechanism of surface corrosion, mildew and fogging of optical parts.
26. This paper discusses how to solve the complex ideal optical system problems in optics by matrix method, and writes a computer program for solving these problems in C language.
27. The greater the intensity of atmospheric turbulence, the higher the cutoff frequency of adaptive optical system, and the greater the influence of crosswind.
28. Aiming at the popular high-definition camera phone in the market, the camera lens is designed and optimized by using ZEMAX engineering optical design software, and the optimization results are analyzed.
29. This paper discusses the application of laser and Faraday magneto-optical effect sensing principle to measure magnetic field with a brand-new optical method.
30. In the missile flight test, the initial ballistic position parameters are generally obtained by the intersection measurement of two optical theodolite.
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