CN112817080A

CN112817080A - Circular ring structure ultraviolet band-pass filter applied to wood lamp

Info

Publication number: CN112817080A
Application number: CN202110103307.4A
Authority: CN
Inventors: 钟成刚
Original assignee: Shenzhen Ruiou Optical System Co ltd
Current assignee: Shenzhen Ruiou Optical System Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-05-18

Abstract

The invention discloses an ultraviolet band-pass filter with a circular structure applied to a wood lamp, which comprises a filter body made of ZWB2 type ultraviolet transmission visible light absorption glass, wherein the filter body is clamped in a limit annular groove at the upper end of a wood lamp circular light source seat, the upper end of the center position of the wood lamp circular light source seat is clamped with an amplifying lens through an end cover, the filter body is annular, the inner diameter of the filter body is 53.1mm, and the positive tolerance is 0.5 mm; the outer diameter of the optical filter body is 81.9mm, and the negative tolerance is 0.3 mm; the thickness of the optical filter body is 2mm, and the tolerance is +/-0.02 mm. The invention can achieve the purposes of passing ultraviolet rays in specific wave bands and cutting off visible light, and has the functions of protecting light sources and preventing dust; the effective irradiation area of the wood lamp is increased, and the output ultraviolet rays are uniformly distributed in the effective irradiation area; the original function of the magnifying lens can be kept while the characteristics of the optical filter body are exerted, so that the function of the wood lamp is more complete.

Description

Circular ring structure ultraviolet band-pass filter applied to wood lamp

Technical Field

The invention relates to the technical field of wood lamps, in particular to an ultraviolet band-pass filter with a circular ring structure, which is applied to wood lamps.

Background

The wood lamp is a device capable of emitting 320-400nm long-wave ultraviolet rays. Skin diseases such as vitiligo, tinea capitis, and tinea capitis, microorganisms such as fungi, bacteria, blood, sweat, and urine, and fluorescent agent etc. can show fluorescence of specific color under irradiation of long-wave ultraviolet rays. The wood lamp is widely applied to the occasions of dermatology disease diagnosis, hotel sanitary inspection, industrial leakage detection, criminal site investigation, authenticity identification of bank notes, certificates and cultural relics and the like by utilizing the principle.

Although the use of wood lamp is widespread, the use experience of years has precipitated that many of the shortcomings of the existing wood lamp, which are still to be solved, are revealed as follows:

ultraviolet rays of specified wavelength band need to be transmitted:

the ideal ultraviolet output band of a wood lamp is: 320-400nm, the wavelength of the actually output ultraviolet ray is lower than 320nm under the influence of the material and precision of the optical filter, but the wavelength is not lower than 280nm at least, because the wavelength band below 280nm is UVC ultraviolet ray, UVC can hurt the skin and eyes of people, the output of the ultraviolet ray below 280nm is required to be shielded by using a special optical filter, and meanwhile, in order to ensure that UVA with enough intensity is output, the transmittance of the ultraviolet ray in the wavelength band of 320-400nm is higher than 80%.

Visible light interference, affecting the observed fluorescence:

visible light interference is the biggest problem affecting the use of wood lamps. When the wood lamp is used in a dark environment, the wood lamp is required to be free from a filter for filtering visible light, and the visible light can be white and out of sight of the illuminated object, so that the observation of the fluorescent color becomes extremely difficult.

Fluorescence was observed under the influence of UV overexposure:

when the light is too concentrated, a light spot is formed on the surface of the irradiated object, and the brightness of the light spot is obviously higher than that of the periphery of the light spot, which is called as the phenomenon: and (4) overexposure. Overexposure also occurs when the uv light is too concentrated, the effect being that the brightness of the spot has interfered with the proper appearance of the fluorescent color. Therefore, the ultraviolet band-pass filter with the circular ring structure applied to the wood lamp is provided.

Disclosure of Invention

The invention aims to provide an ultraviolet band-pass filter with a circular ring structure applied to a wood lamp, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the ultraviolet band-pass filter with the circular ring structure applied to the wood lamp comprises a filter body made of ZWB2 type ultraviolet transmission visible light absorption glass, wherein the filter body is clamped in a limiting annular groove at the upper end of a wood lamp circular light source seat, the upper end of the center position of the wood lamp circular light source seat is clamped with an amplifying lens through an end cover, the filter body is annular, the inner diameter of the filter body is 53.1mm, and the positive tolerance is 0.5 mm; the outer diameter of the optical filter body is 81.9mm, and the negative tolerance is 0.3 mm; the thickness of the optical filter body is 2mm, and the tolerance is +/-0.02 mm.

As a further optimization of the technical scheme, a handle is connected to the side edge of the wood lamp circular light source seat, and a button switch is arranged on the surface of one end, close to the wood lamp circular light source seat, of the handle.

As a further optimization of the technical scheme, an annular supporting seat for supporting the bottom of the magnifying lens is arranged at the central position of the wood lamp circular light source seat, the threaded portion at the bottom of the end cover is screwed with the central position of the wood lamp circular light source seat and then clamped on the side edge of the upper end of the magnifying lens, and the limiting ring at the upper end of the threaded portion is clamped on the upper end of the inner side of the optical filter body.

Compared with the prior art, the invention has the beneficial effects that: the invention enables the circular ultraviolet light source to be applied to a wood lamp, can achieve the purposes of passing ultraviolet rays in specific wave bands and cutting off visible light, and has the functions of protecting the light source and preventing dust; increasing effective irradiation area of wood lamp, and uniformly distributing output ultraviolet within the effective irradiation area of 300cm²Can be greater than 0.4; the magnifying lens can be adapted to the wood lamp, the original function of the magnifying lens can be kept while the characteristics of the optical filter body are exerted, and the functions of the wood lamp are more complete.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic front perspective view of the present invention;

fig. 3 is a schematic back perspective view of the present invention.

In the figure: 1 handle, 2 button switches, 3 magnifying lens, 4 wood lamp circular light source seat, 5 optical filter body, 6 end cover, 61 spacing ring, 62 screw thread portion, 7 spacing annular groove, 8 annular supporting seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an ultraviolet band-pass filter with a circular ring structure applied to a wood lamp comprises a filter body 5 made of ZWB2 type ultraviolet transmission visible light absorption glass, wherein the filter body 5 is clamped in a limiting annular groove 7 at the upper end of a wood lamp circular light source seat 4, the upper end of the center position of the wood lamp circular light source seat 4 is clamped with an amplifying lens 3 through an end cover 6, the filter body 5 is annular, the inner diameter of the filter body 5 is 53.1mm, and the positive tolerance is 0.5 mm; the outer diameter of the optical filter body 5 is 81.9mm, and the negative tolerance is 0.3 mm; the thickness of the optical filter body 5 is 2mm, and the tolerance is +/-0.02 mm.

Specifically, a handle 1 is connected to the side edge of the wood lamp circular light source seat 4, and a button switch 2 is arranged on the surface of one end, close to the wood lamp circular light source seat 4, of the handle 1.

Specifically, an annular support seat 8 for supporting the bottom of the magnifying lens 3 is arranged at the central position of the wood's lamp circular light source seat 4, a threaded portion 62 at the bottom of the end cover 6 is screwed into the central position of the wood's lamp circular light source seat 4 and then clamped on the side edge of the upper end of the magnifying lens 3, and a limit ring 61 at the upper end of the threaded portion 62 is clamped on the upper end of the inner side of the optical filter body 5.

Specifically, during the use, the magnifying lens 3 of 6 joint of end cover is passed through to wood lamp circular light source seat 4's central point department upper end, and this magnifying lens 3 can help enlargiing some tiny, obscure fluorescence signs, through this magnifying lens 3, can also make things convenient for the cell-phone to shoot the picture and keep the inspection result. Further, the magnifying lens 3 also functions to protect the eyes from ultraviolet rays when viewed.

The filter body 5 cuts off the part of the visible light band of 430-730nm, and the maximum transmittance of the visible light cannot exceed 20%. For infrared rays greater than 730nm, since the infrared rays have exceeded the maximum visible range of the human eye, the filter body 5 is allowed to transmit the infrared rays without affecting the color of the observed fluorescence.

In order to avoid overexposure, the uniformity of the ultraviolet irradiance within the effective irradiation area is required to be greater than 0.4, and in order to achieve the required uniformity, the wood lamp circular light source base 4 is of a circular structure, which requires that the corresponding filter body 5 is also circular, so that the ultraviolet rays can be uniformly distributed within the effective irradiation area.

The filter body 5 is made of ZWB2 type ultraviolet transmitting visible light absorbing glass, and is required to transmit ultraviolet rays for ZWB2, and the base glass is phosphate glass. In order to improve the ultraviolet transmission, reducing agents are also introduced, such as: sugar, tartaric acid, etc., to make Fe impurity be present in trace amount³⁺Reduction to Fe²⁺And ultraviolet absorption is reduced.

The prior technical scheme comprises the following steps: circular filter, square filter also adopt ZWB2 type material, can realize that the ultraviolet ray of specific wave band passes through, the visible light cuts off, dustproof and protection light source. However, the existing technical scheme can not solve the problems of ultraviolet overexposure, incapability of adapting to a magnifying lens and poor irradiance uniformity.

Compared with the prior art, the invention brings the following beneficial effects:

the round ultraviolet light source can be applied to a wood lamp, the purposes of passing ultraviolet rays with specific wave bands and stopping visible light can be achieved, and the round ultraviolet light source has the functions of protecting the light source and preventing dust.

Increasing effective irradiation area of wood lamp, and outputting ultraviolet ray on effective irradiation surfaceUniformly distributed in the product, at 300cm²Can be greater than 0.4.

The magnifying lens 3 can be adapted to the wood lamp, the original function of the magnifying lens 3 can be kept while the characteristics of the optical filter body 5 are exerted, and the function of the wood lamp is more complete.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An ultraviolet band-pass filter of a circular ring structure applied to a wood lamp, comprising a filter body (5) made of ZWB2 type ultraviolet transmitting visible light absorbing glass, characterized in that: the optical filter body (5) is clamped in a limiting annular groove (7) at the upper end of a wood's lamp circular light source seat (4), the upper end of the central position of the wood's lamp circular light source seat (4) is clamped with an amplifying lens (3) through an end cover (6), the optical filter body (5) is annular, the inner diameter of the optical filter body is 53.1mm, and the positive tolerance is 0.5 mm; the outer diameter of the optical filter body (5) is 81.9mm, and the negative tolerance is 0.3 mm; the thickness of the optical filter body (5) is 2mm, and the tolerance is +/-0.02 mm.

2. The ultraviolet band pass filter with a circular ring structure applied to a wood lamp as claimed in claim 1, wherein: the side of the wood lamp circular light source seat (4) is connected with a handle (1), and a button switch (2) is arranged on the surface of one end, close to the wood lamp circular light source seat (4), of the handle (1).

3. The ultraviolet band pass filter with a circular ring structure applied to a wood lamp as claimed in claim 1, wherein: the optical filter is characterized in that an annular supporting seat (8) used for supporting the bottom of the magnifying lens (3) is arranged at the center of the wood lamp circular light source seat (4), a threaded portion (62) at the bottom of the end cover (6) is in threaded connection with the center of the wood lamp circular light source seat (4) and then is clamped on the side edge of the upper end of the magnifying lens (3), and a limiting ring (61) at the upper end of the threaded portion (62) is clamped on the upper end of the inner side of the optical filter body (5).