A hollow cathode lamp dimming device

Abstract

The utility model discloses a hollow cathode lamp light adjusting device belongs to hollow cathode lamp field, including inner sleeve, the outer wall of inner sleeve is provided with screw thread, the inside right -hand member of inner sleeve is fixed with convex lens, and the front end of inner sleeve is connected with outer sleeve through screw thread structure, and the inner wall of outer sleeve is provided with screw thread, and the right -hand member of outer sleeve is fixed with concave lens, and the left -hand member of inner sleeve is connected with lock nut through screw thread, and lock nut inlay has O type rubber ring. The utility model hollow cathode lamp light adjusting device is fixed to the ordinary hollow cathode lamp lamp shell, and realizes focusing through the screwing of outer sleeve, can make the output light convergence into approximate parallel light column, realizes different combination through the replacement of the convex lens and concave lens of different focal length, realizes the light adjusting requirement of the output different thickness light column, owing to the light of output approximate column, has improved the light utilization.

Description

Technical Field

[0001] This utility model relates to the field of hollow cathode lamps in atomic absorption spectroscopy, and more specifically to a dimming device for a hollow cathode lamp used in an atomic absorption spectrometer. Background Technology

[0002] Hollow cathode lamps serve as the sharp-line light source for atomic absorption spectrometers. Their light transmission windows are made of flat quartz glass and do not have a light-converging function. The light convergence is achieved on the atomic absorption spectrometer itself, typically by placing a convex lens in the front and rear optical paths of the burner to focus the light.

[0003] This method has two drawbacks. First, the converged light forms a cone shape, causing some light to miss the burner. Second, because the converged light forms a cone shape, some areas in the burner do not receive illumination from the hollow cathode lamp, resulting in reduced light utilization.

[0004] Chinese utility model patent CN222864775U discloses an adjustment mechanism for a hollow cathode lamp. The principle is to set a movable convex lens in front of the hollow cathode lamp. The position of the light focal point is adjusted by moving the convex lens. After the light is focused, it is still a cone-shaped beam, which does not have much effect on improving the light utilization rate.

[0005] To resolve this contradiction, this utility model describes a hollow cathode lamp dimming device. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a dimming device for a hollow cathode lamp, which transforms the divergent light output by the hollow cathode lamp into convergent parallel light, thereby improving the light utilization rate of the hollow cathode lamp.

[0007] To address the aforementioned technical problems, the technical solution adopted by this utility model is as follows.

[0008] A hollow cathode lamp dimming device includes an inner sleeve with external threads on its outer wall, an outer sleeve with internal threads on its inner wall, and a locking nut for locking the inner sleeve. A stepped convex lens limiting ring is provided inside the right end of the inner sleeve, supporting a convex lens. The inner wall of the right end of the convex lens has a locking internal thread, which connects to a locking ring with external threads. The outer sleeve is connected to the inner sleeve via a threaded structure. A stepped concave lens limiting ring is provided inside the right end of the outer sleeve, supporting a concave lens. The inner wall of the right end of the concave lens has a locking internal thread, which connects to a locking ring with external threads. The left end of the inner sleeve is connected to the locking nut via threads, and an O-ring is embedded in the locking nut.

[0009] The focal length of the convex lens is greater than that of the concave lens.

[0010] The convex and concave lenses are made of quartz.

[0011] The inner sleeve, outer sleeve, and locking nut are made of plastic.

[0012] The inner diameter of the O-ring is equal to the inner diameter of the inner sleeve, and the wire diameter of the O-ring is equal to the wall thickness of the inner sleeve.

[0013] The inner diameter of the left end of the locking nut is equal to the inner diameter of the inner sleeve.

[0014] Due to the adoption of the above technical solutions, the technical progress achieved by this utility model is as follows:

[0015] The hollow cathode lamp dimming device of this utility model is fixed to the lamp housing of an ordinary hollow cathode lamp. By turning the outer sleeve, the focus can be adjusted so that the output light can be converged into an approximately parallel light column. By replacing the convex lens and concave lens with different focal lengths, different combinations can be achieved to meet the dimming requirements of output light columns of different thicknesses. Since the output light is approximately columnar, the light utilization rate is improved. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0017] Figure 2 This is a three-dimensional schematic diagram of the locking nut and inner sleeve in this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the outer sleeve of this utility model;

[0019] Among them: 11. Inner sleeve; 12. Convex lens limiting ring; 13. Convex lens locking ring; 21. Outer sleeve; 22. Concave lens limiting ring; 23. Concave lens locking ring; 31. Locking nut; 32. O-ring; 33. Pressure ring; 4. Convex lens; 5. Concave lens. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] A hollow cathode lamp dimming device, with the following structure: Figure 1 , Figure 2 , Figure 3 As shown.

[0022] The inner sleeve (11) is provided with threads on its outer wall. A convex lens limiting ring (12) is provided at the right end of the inner sleeve (11). The convex lens limiting ring (12) is used to support the convex lens (4). The convex lens locking ring (13) is used to lock the convex lens (4). The convex lens locking ring (13) is connected to the inner sleeve (11) through a threaded structure. The inner sleeve (11), convex lens (4), and convex lens locking ring (13) form a whole.

[0023] The inner wall of the outer sleeve (21) is provided with an internal thread on the left end, and a concave lens limiting ring (22) is provided on the inner wall of the outer sleeve (21) on the right end. The concave lens limiting ring (22) supports the concave lens (5), and the concave lens locking ring (23) is used to lock the concave lens (5). The concave lens locking ring (23) is connected to the outer sleeve (21) through a threaded structure. The outer sleeve (21), the concave lens (5), and the concave lens locking ring (23) form a whole.

[0024] A clamping ring (33) is provided on the left end of the locking nut (31). An O-ring (32) is embedded in the locking nut (31). By tightening the locking nut (31), the O-ring (32) is squeezed to press the hollow cathode lamp housing, thus playing a fixing role.

[0025] The inner sleeve (11), outer sleeve (21), and locking nut (31) are made of plastic and are formed by extrusion or injection molding.

[0026] The convex lens (4) and the concave lens (5) are made of quartz.

[0027] The inner diameter of the O-ring (32) is equal to the inner diameter of the inner sleeve (11), and the wire diameter of the O-ring (32) is equal to the wall thickness of the inner sleeve (11).

[0028] The inner diameter of the inner sleeve (11) is 0.5 mm larger than the diameter of the hollow cathode lamp housing.

[0029] Install the outer sleeve, inner sleeve, lock nut, and O-ring as follows: Figure 1 Their positions are connected to form a whole.

[0030] The assembled hollow cathode lamp dimming device is placed on the hollow cathode lamp housing, and the locking nut (31) is tightened to achieve locking and fixation. The outer sleeve (21) is turned to achieve the function of adjusting the beam.

Claims

1. A dimming device for a hollow cathode lamp, characterized in that, The device includes an inner sleeve (11) with threads on its outer wall. A convex lens limiting ring (12) is provided inside the right end of the inner sleeve (11), and a convex lens (4) is supported on the convex lens limiting ring. A convex lens locking ring (13) is provided at the right end of the convex lens. An outer sleeve (21) has internal threads on its left end. The outer sleeve (21) is connected to the inner sleeve (11) through a threaded structure. A concave lens limiting ring (22) is provided inside the right end of the outer sleeve (21), and a concave lens (5) is supported on the concave lens limiting ring. A concave lens locking ring (23) is provided at the right end of the concave lens. The left end of the inner sleeve (11) is connected to a locking nut (31) through threads. An O-ring (32) is embedded in the locking nut (31).

2. The hollow cathode lamp dimming device according to claim 1, characterized in that, The focal length of the convex lens (4) is greater than that of the concave lens (5).

3. The hollow cathode lamp dimming device according to claim 1, characterized in that, The convex lens (4) and the concave lens (5) are made of quartz.

4. The hollow cathode lamp dimming device according to claim 1, characterized in that, The inner sleeve (11), outer sleeve (21), and locking nut (31) are made of plastic.

5. A hollow cathode lamp dimming device according to claim 1, characterized in that, The convex lens limiting ring (12) and the concave lens limiting ring (22) are stepped.

6. A hollow cathode lamp dimming device according to claim 1, characterized in that, The convex lens locking ring (13) is connected to the inner sleeve (11) through a threaded structure, and the concave lens locking ring (23) is connected to the outer sleeve (21) through a threaded structure.

7. A hollow cathode lamp dimming device according to claim 1, characterized in that, The inner diameter of the O-ring (32) is equal to the inner diameter of the inner sleeve (11), and the wire diameter of the O-ring (32) is equal to the wall thickness of the inner sleeve (11).

8. A hollow cathode lamp dimming device according to claim 1, characterized in that, The inner diameter of the left end of the locking nut (31) is equal to the inner diameter of the inner sleeve (11).

9. A hollow cathode lamp dimming device according to claim 1, characterized in that, The inner diameter of the inner sleeve (11) is 0.5 mm larger than the diameter of the hollow cathode lamp housing.

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