The science of optics in the 17th century expressed the fundamental outlook of the Scientific Revolution by combining an experimental approach with a quantitative analysis of phenomena. Optics had its origins in Greece, especially in the works of Euclid (c. 300 bce), who stated many of the results in geometric optics that the Greeks had discovered, including the law of reflection: the angle of incidence is equal to the angle of reflection. In the 13th century, such men as Roger Bacon, Robert Grosseteste, and John Pecham, relying on the work of the Arab Ibn al-Haytham (died c. 1040), considered numerous optical problems, including the optics of the rainbow. It was Kepler, taking his lead from the writings of these 13th-century opticians, who set the tone for the science in the 17th century. Kepler introduced the point by point analysis of optical problems, tracing rays from each point on the object to a point on the image. Just as the mechanical philosophy was breaking the world into atomic parts, so Kepler approached optics by breaking organic reality into what he considered to be ultimately real units. He developed a geometric theory of lenses, providing the first mathematical account of Galileo’s telescope.

Optica

Chemistry had manifold origins, coming from such diverse sources as philosophy, alchemy, metallurgy, and medicine. It emerged as a separate science only with the rise of mechanical philosophy in the 17th century. Aristotle had regarded the four elements earth, water, air, and fire as the ultimate constituents of all things. Transmutable each into the other, all four elements were believed to exist in every substance. Originating in Egypt and the Middle East, alchemy had a double aspect: on the one hand it was a practical endeavour aimed to make gold from baser substances, while on the other it was a cosmological theory based on the correspondence between man and the universe at large. Alchemy contributed to chemistry a long tradition of experience with a wide variety of substances. Paracelsus, a 16th-century Swiss natural philosopher, was a seminal figure in the history of chemistry, putting together in an almost impenetrable combination the Aristotelian theory of matter, alchemical correspondences, mystical forms of knowledge, and chemical therapy in medicine. His influence was widely felt in succeeding generations.

History ofoptics

During the first half of the 17th century, there were few established doctrines that chemists generally accepted as a framework. As a result, there was little cumulative growth of chemical knowledge. Chemists tended to build detailed systems, “chemical philosophies,” attempting to explain the entire universe in chemical terms. Most chemists accepted the traditional four elements (air, earth, water, fire), or the Paracelsian principles (salt, sulfur, mercury), or both, as the bearers of real qualities in substances; they also exhibited a marked tendency toward the occult.

The kit includes two or four linear actuator, a synchronous controller a control handle and a wireless remote control. You can use a synchronous controller to operate multiple linear actuators to rise or fall synchronously, for example two or four electric actuators.. They work completely in sync without any difference..Mainly used for doors, windows, solar tracking system, medical devices, agricultural machinery, vehicles, ships, elevator platforms, lifting tables, TV lifts, robots, cabinetries, massage sofas, electric beds, medical chairs and other electrical equipment. It can open, close, push, pull, lift and descend these devices.It can replace hydraulic and pneumatic products to save power consumption.

Oct 3, 2024 — To find the total magnification of a microscope, multiply the objective lens's power by the eyepiece's power. For example, if using a 10X ...

optics中文

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The linear actuator A2 slide controller kit includes an linear actuator A2 with potentiometer, a slide controller and a 10K slide potentiometer. The stroke of linear actuator A2 can be controlled by twisting the knob or sliding the slide potentiometer. Slide the handle of the slide potentiometer to a position in its travel, the linear actuator will extend or retract to the corresponding position in its travel accordingly. Turn the knob switch to a position in its travel, the linear actuator will extend or retract to the corresponding position in its travel accordingly.

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Descartes sought to incorporate the phenomena of light into mechanical philosophy by demonstrating that they can be explained entirely in terms of matter and motion. Using mechanical analogies, he was able to derive mathematically many of the known properties of light, including the law of reflection and the newly discovered law of refraction.

Optical

Optics

The most powerful strategy to develop MOFs with intensive absorption in visible light region is to use ligands with broad light absorption to fabricate the MOFs ...

Optics physicsexplained

Lapping machines: Lapping machines are used for fine polishing and finishing of optical surfaces to achieve sub-micron surface roughness and flatness. They ...

While some of the microscope optical components act as image-forming elements, others serve to produce various modifications to illumination of the specimen and ...

Waveoptics

The kit includes a linear actuator and a wireless remote control. You can operate the extension or retraction movement of the linear actuator via the remote control.Mainly used for doors, windows, solar tracking system, medical devices, agricultural machinery, vehicles, ships, elevator platforms, lifting tables, TV lifts, robots, cabinetries, massage sofas, electric beds, medical chairs and other electrical equipment. It can open, close, push, pull, lift and descend these devices.It can replace hydraulic and pneumatic products to save power consumption.

Many of the most important contributions to optics in the 17th century were the work of Newton, especially the theory of colours. Traditional theory considered colours to be the result of the modification of white light. Descartes, for example, thought that colours were the result of the spin of the particles that constitute light. Newton upset the traditional theory of colours by demonstrating in an impressive set of experiments that white light is a mixture out of which separate beams of coloured light can be separated. He associated different degrees of refrangibility with rays of different colours, and in this manner he was able to explain the way prisms produce spectra of colours from white light.

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The interaction between chemistry and mechanical philosophy altered this situation by providing chemists with a shared language. The mechanical philosophy had been successfully employed in other areas; it seemed consistent with an experimental empiricism and seemed to provide a way to render chemistry respectable by translating it into the terms of the new science. Perhaps the best example of the influence of the mechanical philosophy is the work of Robert Boyle. The thrust of his work was to understand the chemical properties of matter, to provide experimental evidence for the mechanical philosophy, and to demonstrate that all chemical properties can be explained in mechanical terms. He was an excellent laboratory chemist and developed a number of important techniques, especially colour-identification tests.

Electric linear actuator offers precise control over linear motion, can be easily automated, and are suitable for both small-scale and large-scale applications. An electric linear actuator is a device that converts the rotary motion into the linear motion. This conversion of motion is done with the help of a gearbox and a lead screw. The electric linear actuator is composed of 5 main components: motor, limit switches, lead screw, gears set and stroke rod. Please read the article for details: electric linear actuator working principle.

For both eyes the combined visual field is 130–135° vertical and 200–220° horizontal." Upvote

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His experimental method was characterized by a quantitative approach, since he always sought measurable variables and a clear distinction between experimental findings and mechanical explanations of those findings. His second important contribution to optics dealt with the interference phenomena that came to be called “Newton’s rings.” Although the colours of thin films (e.g., oil on water) had been previously observed, no one had attempted to quantify the phenomena in any way. Newton observed quantitative relations between the thickness of the film and the diameters of the rings of colour, a regularity he attempted to explain by his theory of fits of easy transmission and fits of easy reflection. Notwithstanding the fact that he generally conceived of light as being particulate, Newton’s theory of fits involves periodicity and vibrations of ether, the hypothetical fluid substance permeating all space.

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Huygens was the second great optical thinker of the 17th century. Although he was critical of many of the details of Descartes’s system, he wrote in the Cartesian tradition, seeking purely mechanical explanations of phenomena. Huygens regarded light as something of a pulse phenomenon, but he explicitly denied the periodicity of light pulses. He developed the concept of wave front, by means of which he was able to derive the laws of reflection and refraction from his pulse theory and to explain the recently discovered phenomenon of double refraction.

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