Achromatic Lens:Stray light in optical design

Where does the stray light concept in design and optical technology originate? The understanding and interpretation about the notion of “stray light” in design is inconsistant among various optical designers which creates obstacles to communications between designers and, to a certain extent hindering progress in area of stray light study and suppression.

Stray light refers to not-designed light that travels through the optical system and eventually reaches the image plane. It is a generalization of abnormal transmission of light through the optical system. This eventually creates different kinds of artifacts that appear in the picture plane.

When creating an optical system, the amount of stray light must be reduced to the minimum to ensure proper functioning for the device. In any optical system, there will have stray light specifically lenses are used for the following reasons such as the sun or other kinds of bright light sources to examine the creation of stray light due to ghost pictures; precision measurements of radiance like satellites or other space sensors emit stray light on the precision of the larger impact. projection system contrasts is diminished because of light stray; infrared cameras function when the system’s infrared radiation is created through the formation of stray light onto the system that causes the effect of spectral as well as various other measurements. Multi-spectral measurements of stray light is caused by crosstalk between spectrum.

n the past according most optical engineers who examine and analyze the sources of light that stray can be broadly classified into three types:

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1.capturing the stray light

Imaging class stray light is among the visible optical systems required to analyze the stray light source as well as the typical design of the light passing through refractive optical elements, a tiny amount of light scattering and reflection, but it will eventually be visible on the image’s surface, the normal light path image negative impacts.

In this case, it is worth noting that regardless of how the refractive element within the optical system works, i.e. that the lens’s surface treated in the optical system, the lens’s surface will not be smooth enough to reduce scattering. It cannot lower the reflective power of the material to a minimum with the result that there is a minimal amount of light reflected.

For imaging optical systems when you have a lot of lenses inside the system are excessively large or the task on the source of light that is facing the source of energy is intense, any scattered light that could be a source of negative effects of imaging is magnified, like images of surfaces of prominent bright bands or spots of light.

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2. the components of their system that make up the radiation they produce

For instance the infrared optical system produces infrared radiation. Similarly, together with the drive system as well as other systems in the optical structure if the working period is excessively long the rise in temperature will also generate thermal radiation. The stray radiation produced by these components inside the serious can cause the creation of noise on the image’s surface.

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3.The influence of light sources

For instance sunlight and its various types of surfaces, such as the ground as well as the atmosphere, and others reflections, refraction and scattering in the optical system in the event that energy levels are too high in the optical system following the formation of noise on the image surface, which affects the quality of imaging.Product detail to contact us.

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