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Perhaps, while we are enjoying the convenience of optoelectronic products, we are ignoring the important components of the optoelectronic products, the cylindrical lens.
As we all know, Optoelectronic products are mostly composed of the light path system, electronics and mechanical systems. Light path system is considered to be crucial in the process of information collection and transmission.
The optical system is composed of lenses, spectroscopes, and reflectors. The surface is usually a sphere or plane. The cylindrical lens is non-spherical, which can effectively reduce the ball difference and color difference. It is divided into flat convex cylindrical lens, flat concave cylindrical lens, double convex cylindrical lens and double concave cylindrical lens. It has one-dimensional amplification. Cylindrical lenses are designed to change the size of the image. For example, turn a spot of light into a patch or change the height of the image without changing the width. The special optical properties of the cylindrical lens make the cylindrical lens more and more widely used with the rapid development of high technology. Such as line gather system. films system. fax machines and printing typesetting scanning imaging system. And in the field of medical gastroscope. Laparoscopic, in the field of auto car video system with the participation of cylindrical lens. Linear detector at the same time in lighting, bar code scanning, holographic lighting, optical information processing, computer, laser emission. And the strong laser system and also has been widely used in synchrotron radiation beam line. At the same time, with the constant improvement of cylindrical lens processing technology, has formed a mature and effective processing technology, the quality of its good reproducibility and repeatability gradually been recognized by the market. At present, the process is gradually replacing the relatively backward traditional technology.
The cylindrical lens is known to consist of a flat and a concave (convex) surface or two concave (convex) surfaces. It can be divided into flat convex cylindrical lens, concave cylindrical lens, double convex cylindrical lens, double concave cylindrical lens, convex concave cylindrical lens. The shape is shown below:
Perhaps, while we are enjoying the convenience of optoelectronic products, we are ignoring the important components of the optoelectronic products, the cylindrical lens.As we all know, Optoelectronic products are mostly composed of the light path system, electronics and mechanical systems. Light path system is considered to be crucial in the process of information collection and transmission.The optical system is composed of lenses, spectroscopes, and reflectors. The surface is usually a sphere or plane. The cylindrical lens is non-spherical, which can effectively reduce the ball difference and color difference. It is divided into flat convex cylindrical lens, flat concave cylindrical lens, double convex cylindrical lens and double concave cylindrical lens. It has one-dimensional amplification. Cylindrical lenses are designed to change the size of the image. For example, turn a spot of light into a patch or change the height of the image without changing the width. The special optical properties of the cylindrical lens make the cylindrical lens more and more widely used with the rapid development of high technology. Such as line gather system. films system. fax machines and printing typesetting scanning imaging system. And in the field of medical gastroscope. Laparoscopic, in the field of auto car video system with the participation of cylindrical lens. Linear detector at the same time in lighting, bar code scanning, holographic lighting, optical information processing, computer, laser emission. And the strong laser system and also has been widely used in synchrotron radiation beam line. At the same time, with the constant improvement of cylindrical lens processing technology, has formed a mature and effective processing technology, the quality of its good reproducibility and repeatability gradually been recognized by the market. At present, the process is gradually replacing the relatively backward traditional technology.The cylindrical lens is known to consist of a flat and a concave (convex) surface or two concave (convex) surfaces. It can be divided into flat convex cylindrical lens, concave cylindrical lens, double convex cylindrical lens, double concave cylindrical lens, convex concave cylindrical lens. The shape is shown below:
The cylindrical lens is a combination of two optical surfaces, and the relative position of two optical surfaces determines the overall optical properties of the
The cylindrical lens is a combination of two optical surfaces, and the relative position of two optical surfaces determines the overall optical properties of the cylindrical lens . So how to ensure the rationality of the relative position of two optical surfaces is the key and difficult point in the process of cylindrical lens. What is the ideal relationship between the two optical surfaces? Here is an example of the three views of a flat convex lens.
So in the process of cylindrical lens, if the relative position of two optical surface anomalies, common adverse project has the following kinds: (flat convex cylindrical lens, for example)
One. Bus bad
A: Bus offset: the cylindrical optic surface is offset by the cylinder axis opposite to the flat center. Here is the picture:
Causes and countermeasures:
1.The design or machine of fixture is defective, and the attached surface and the center line are not good. You need to start with the fixture.
2. The lens stick is not in place, need to be attached to the working method to begin to improve.
3. The product moves during processing. Need adhesive adhesion and processing time lens force load begin to improve.
B: Bus tilt: the surface of the cylinder is tilted in a certain angle to the plane. The bus line is not parallel to the attached datum. Here is the picture:
Causes and countermeasures:
1. The design or machine of fixture is defective, the surface of the lens is attached to the axis of the central axis and the failure of the channel is not good. You need to start with the fixture.
2. The lens stick is not in place, need to be attached to the working method to begin to improve.
Two. The bus is perpendicular to the line
Causes and countermeasures:
1. The design or machine of fixture is defective, and the two benchmarks are not straight. You need to start with the fixture.
2. The lens stick is not in place, need to be attached to the working method to begin to improve.
3. The cutting machine is not accurate, and the main shaft and the desktop are in the wrong angle. It is necessary to improve the machining accuracy. In accordance with stated in, cylinder lens bus location plays an important role in the optical performance, then the bus in addition to guarantee in the process of machining, in the test link is also very important. Here's a new way to detect a cylindrical lens:
So in the process of cylindrical lens, if the relative position of two optical surface anomalies, common adverse project has the following kinds: (flat convex cylindrical lens, for example)A: Bus offset: the cylindrical optic surface is offset by the cylinder axis opposite to the flat center. Here is the picture:Causes and countermeasures:1.The design or machine of fixture is defective, and the attached surface and the center line are not good. You need to start with the fixture.2. The lens stick is not in place, need to be attached to the working method to begin to improve.3. The product moves during processing. Need adhesive adhesion and processing time lens force load begin to improve.B: Bus tilt: the surface of the cylinder is tilted in a certain angle to the plane. The bus line is not parallel to the attached datum. Here is the picture:Causes and countermeasures:1. The design or machine of fixture is defective, the surface of the lens is attached to the axis of the central axis and the failure of the channel is not good. You need to start with the fixture.2. The lens stick is not in place, need to be attached to the working method to begin to improve.Causes and countermeasures:1. The design or machine of fixture is defective, and the two benchmarks are not straight. You need to start with the fixture.2. The lens stick is not in place, need to be attached to the working method to begin to improve.3. The cutting machine is not accurate, and the main shaft and the desktop are in the wrong angle. It is necessary to improve the machining accuracy. In accordance with stated in, cylinder lens bus location plays an important role in the optical performance, then the bus in addition to guarantee in the process of machining, in the test link is also very important. Here's a new way to detect a cylindrical lens:
Point laser reflection detector
Principle:
Using a laser generator through a special lens will be test cylinder lens, the light source into cylindrical lens by cylinder after receives the light source the light source is reflected back to image receiver, again by the CCD camera images appear on the display equipment. The final judgment is made by the testers.
Principle:Using a laser generator through a special lens will be test cylinder lens, the light source into cylindrical lens by cylinder after receives the light source the light source is reflected back to image receiver, again by the CCD camera images appear on the display equipment. The final judgment is made by the testers.
Advantages:
High detection accuracy: the detection error can be controlled in 0.001 mm.
High detection efficiency: the skilled person can detect 20PCS per minute.
Do not affect the appearance: using laser reflection to detect has no direct contact to the surface of the product and to the product appearance does not have the effect.
New process of cylindrical lens processing
For a long time, most of the domestic cylindrical mirror manufacturing has been used in the traditional way of processing. It gradually failed to meet customers' needs. Our company is based on many years of lens processing experience, and study abroad advanced processing technology, the development of a set of advanced cylindrical lens to process the new method. This method changes the traditional single chip processing to make the plate processing, greatly improve the processing efficiency, and can reduce the processing cost. The stability of processing quality also increased significantly.
High detection accuracy: the detection error can be controlled in 0.001 mm.High detection efficiency: the skilled person can detect 20PCS per minute.Do not affect the appearance: using laser reflection to detect has no direct contact to the surface of the product and to the product appearance does not have the effect.New process of cylindrical lens processingFor a long time, most of the domestic cylindrical mirror manufacturing has been used in the traditional way of processing. It gradually failed to meet customers' needs. Our company is based on many years of lens processing experience, and study abroad advanced processing technology, the development of a set of advanced cylindrical lens to process the new method. This method changes the traditional single chip processing to make the plate processing, greatly improve the processing efficiency, and can reduce the processing cost. The stability of processing quality also increased significantly.
What is cylindrical lens?
Cylinder Lenses are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylindrical Lenses have a single cylindrical surface that causes incoming light to be focused in only a single dimension, stretching the image. Cylinder Lenses are available with positive or negative focal lengths, ideal for laser line generation or anamorphic beam shaping to circularize laser outputs.
(Picture show of our ZF88 cylindrical lens)
Kinds of cylindrical lens
&#; Plano-Concave Cylindrical lenses have a negative focal length and are used for image reduction or to spread light.
&#; Plano-Convex Cylindrical lenses have a positive focal length, which makes them ideal for collecting and focusing light for many imaging applications.
&#; Double-Convex Lenses are used in image relay applications, or for imaging objects at close conjugates.
&#; Double-Convex Lenses have positive focal lengths, along with two convex surfaces with equal radii. Aberrations will increase as the conjugate ratios increase. DCV Lenses are used in a range of industries or applications.
Cylindrical lens from VY
VY Optics offers a wide variety of Double-Convex Lenses in a range of substrates or anti-reflection coatings for maximum performance in the Ultraviolet (UV), Visible, or Infrared (IR). Anti-reflection coatings include UV-AR, UV Fused Silica or Calcium Fluoride (CaF2) substrates are also available for additional performance in the Ultraviolet (UV) or Infrared (IR) spectrums. UF Fused Silica Double-Convex Lenses are ideal for close conjugate imaging systems utilizing Ultraviolet (UV) illumination. Calcium Fluoride (CaF2) offers a very wide transmission range of 350nm - 7μm.
Material
ZF88; N-bk7; K9; Quartz glass or other optical materials
Dimension Tolerance
+0.0 -- -0.1mm
Center Thickness
+/-0.1mm
Focal Length Tolerance
+/-1%
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Surface Quality
20/10
Surface Figure
lambda/2 at 633nm on plano side
Clear Aperture
>90%
Chamfer
0.25mm at 45 degree typical
Coating
Optional
Most commonly used and the earliest example of an achromatic lens is the achromatic doublet. An achromatic doublet is made from a pair of glasses, of which one is typically a concave and another is convex. The concave element of the doublet is composed of flint glass (with higher dispersion); the convex element, however, is made up of crown glass (with low dispersion). These two elements are placed (cemented) next to each other in such a manner that the chromatic aberration of the one element is balanced by the chromatic aberration of another. There are various types of achromatic lenses, which differ in the type of lens elements and optical properties.
Cylindrical vs Spherical lenses
Imagine a sphere made of glass and suppose we cut on any plane that completely passes through the sphere. Our end part will be a spherical lens with a flat surface and a curved surface. If we illuminate the flat side with a light source, we will see that all the light is focused on a point at a certain distance in front of the lens. If we rotate the spherical lens, the position and shape of the focused light will not change
Now imagine that instead of cutting glass balls, we cut glass cylinders. We need to cut the cylinder with a plane parallel to its axis of rotation (this will be the longest axis). We end up with a lens that is flat on one side and curved on the other. However, the curve of the cylindrical lens is only in one direction. Why is this important? Well, because when we illuminate a cylindrical lens, it will focus on a line instead of a point. Not only that, if we rotate the cylindrical lens along the optical axis, the focus line will change its direction.
Figure 1. We obtain a cylindrical lens by cutting a cylinder along the main axis
Now, we might ask ourselves why we should use a lens that obviously distorts the shape of the light source into a line. Cylindrical lenses actually have many applications, making them very useful in optical systems, sometimes even necessary
If you want to learn more, please visit our website double convex cylindrical lenses.
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