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CN-224216939-U - Long-wave non-refrigeration boiler temperature measuring lens

CN224216939UCN 224216939 UCN224216939 UCN 224216939UCN-224216939-U

Abstract

The utility model relates to the technical field of optics, in particular to a long-wave non-refrigeration boiler temperature measuring lens, which comprises a first lens, a second lens, a secondary imaging lens, an aperture diaphragm and a non-refrigeration detector, wherein the first lens is arranged on the first lens; the utility model sets the boiler temperature measuring lens of the long wave non-refrigeration detector camera composed of the aperture diaphragm, the first lens, the second lens, the secondary imaging lens and the non-refrigeration detector, the working wave band is 8-12 microns, the focal length is 5mm, the aperture is F1.5, the adaptive resolution is 384x288, the non-refrigeration detector with 17 microns pixel size has 150mm total length of the optical system, the maximum caliber is 27mm, the imaging quality is good, the structural length meets the use requirement, the caliber of the lens is small, the tolerance is reasonable, the assembly and adjustment are simple, the mass production is easy, the imaging quality is satisfied, and meanwhile, the utility model has the characteristics of long length, small caliber and large field of view, and can improve the imaging quality, adapt to special application scenes, optimize the optical performance and improve the system integration level.

Inventors

  • XIA RIHUI

Assignees

  • 北京福托依莱科技有限公司

Dates

Publication Date
20260508
Application Date
20250123

Claims (6)

  1. 1. The long-wave non-refrigeration boiler temperature measuring lens comprises a first lens (120) and is characterized by further comprising a second lens (130), a secondary imaging lens (140), an aperture diaphragm (110) and a non-refrigeration detector (150), wherein the aperture diaphragm (110), the first lens (120), the second lens (130), the secondary imaging lens (140) and the non-refrigeration detector (150) are sequentially arranged from an object side to an image side along an optical axis, the non-refrigeration detector (150) comprises a protection window (152) and an imaging focal plane (154), the protection window (152) is positioned at the front part of the non-refrigeration detector (150), the imaging focal plane (154) is positioned at the rear part of the protection window (152), and the parameters of EFL=5 mm, F number=1.5, total length of an optical system containing the refrigeration detector part=150 mm, an adaptation detector 384x288 and the pixel size 17 mu m are met.
  2. 2. The method of claim 1, wherein the first lens (120) is a meniscus germanium lens with a concave surface facing the object, and the first lens has an aspherical surface.
  3. 3. The long-wave non-refrigerating boiler temperature measuring lens as set forth in claim 1, wherein the concave surface of the second lens (130) faces to the meniscus germanium positive lens of the object side, and an aspheric surface is arranged on the meniscus germanium positive lens.
  4. 4. The long-wave non-refrigeration boiler temperature measuring lens as set forth in claim 1, wherein the secondary imaging lens (140) is a meniscus germanium positive lens with a convex surface facing the object side, and has an aspherical surface.
  5. 5. The long-wave non-refrigeration boiler temperature measuring lens as set forth in claim 1, wherein the full field angle of the lens is in a range of 2ω=95°.
  6. 6. The long-wave non-refrigeration boiler temperature measuring lens as set forth in claim 1, wherein the aspherical surface in the lens of the lens satisfies the following expression: wherein z is an aspherical surface having a height in the direction of the optical axis Is located at a high distance vector from the apex of the aspherical surface, Represents the vertex curvature of the surface, k is a conic coefficient, and alpha 2, alpha 3, alpha 4, alpha 5, alpha 6 are higher order aspheric coefficients .

Description

Long-wave non-refrigeration boiler temperature measuring lens Technical Field The utility model relates to the technical field of optics, in particular to a long-wave non-refrigeration boiler temperature measuring lens. Background In the field of blast furnace smelting, operators need to accurately measure the temperature of each position in the furnace, but the technical problems such as the thickness of the furnace wall, large space in the furnace, high temperature and the like are faced, so that the temperature measurement is difficult to achieve accurately, and along with the maturation of the infrared thermal imaging detector technology, the infrared temperature measurement technology can be widely applied to the field of temperature measurement in the furnace, so that an optical system with large field of view, long length and small caliber is urgently needed, the optical system extends into the blast furnace for observation, and a gas cooling device is sleeved outside a lens. The existing non-refrigeration boiler temperature measuring lens is large in view field, the large view field means short in focal length, but the total length of an optical system is required to be long, and the aperture of a lens is small, so that the conventional temperature measuring lens is against each other. Therefore, aiming at the problem that the conventional uncooled boiler temperature measuring lens is in violation of the conventional angle and the large focal length of the field of view, the boiler temperature measuring lens for the long-wave uncooled detector camera can be designed, and has the characteristics of long length, small caliber and large field of view while meeting imaging quality, so that the imaging quality can be improved, the special application scene is adapted, the optical performance is optimized, and the system integration level is improved. Disclosure of utility model In order to solve the problem that the prior non-refrigeration boiler temperature measuring lens is generally large in field of view, short in focal length and contrary to the conventional angle. The technical scheme is that the long-wave non-refrigeration boiler temperature measuring lens comprises a first lens, a second lens, a secondary imaging lens, an aperture diaphragm and a non-refrigeration detector, wherein the aperture diaphragm, the first lens, the second lens, the secondary imaging lens and the non-refrigeration detector are sequentially arranged from an object side to an image side along an optical axis, the non-refrigeration detector comprises a protection window and an imaging focal plane, the protection window is positioned at the front part of the non-refrigeration detector, and the imaging focal plane is positioned at the rear part of the protection window. Preferably, the first lens is a meniscus germanium positive lens with a concave surface facing the object, and has an aspherical surface thereon. Preferably, the second lens is a meniscus germanium positive lens with a concave surface facing the object, and has an aspherical surface thereon. Preferably, the secondary imaging lens is a meniscus germanium positive lens with a convex surface facing the object, and has an aspherical surface thereon. The utility model has the beneficial effects that: 1. Through setting up the boiler temperature measurement lens of the long wave uncooled detector camera that comprises aperture diaphragm, first lens, second lens, secondary imaging lens and uncooled detector, the adaptation resolution is 384x288, the long wave uncooled detector of pixel size 17 microns, optical system overall length 150mm, maximum bore 27mm, imaging quality is good, structural length satisfies the operation requirement, the lens bore is little, the tolerance is reasonable, the dress is transferred simply, easy mass production, while satisfying imaging quality, still have length, bore is little, the visual field is big characteristics, can improve imaging quality, adapt to special application scene, optimize optical performance and improve the system integration degree. Drawings FIG. 1 shows an optical system diagram of a temperature measuring lens of a long-wave non-refrigeration boiler of the utility model; FIG. 2 shows a point diagram of a temperature measuring lens of a long-wave non-refrigeration boiler according to the utility model; FIG. 3 shows a diagram of the optical transfer function of the temperature measurement lens of the long-wave non-refrigeration boiler according to the utility model; FIG. 4 shows an astigmatic aberration diagram of a long wave non-refrigeration boiler temperature measurement lens of the present utility model. Reference numerals illustrate 110, aperture stop, 120, first lens, 130, second lens, 140, secondary imaging lens, 150, uncooled detector, 152, protection window, 154, imaging focal plane, S1-S6, and lens surfaces. Detailed Description The utility model is further described below with reference to the drawings an