Blue light splitting optical filter applied to laser

Abstract

The utility model discloses a blue light splitting optical filter applied to laser, which is characterized in that the blue light splitting optical filter comprises a base layer structure located in the middle, and the first end of the base layer structure is provided with a first light splitting film structure layer; a second light splitting film structure layer is arranged at the second end of the base layer structure; the first light splitting film structure layer is composed of 10 high-refractive-index film structures and low-refractive-index film structures which are alternately stacked from inside to outside; the second light splitting film structure layer is composed of six layers of high-refractive-index film structures and six layers of low-refractive-index film structures which are alternately stacked from inside to outside. The blue light splitting optical filter applied to laser is divided into reflected light and transmission light according to a light splitting ratio of 70%: 30% in a working wave band of 445 + / -10nm.

Description

Technical Field

[0001] This utility model relates to the field of blue light beam splitter filter manufacturing, specifically to a blue light beam splitter filter used in lasers. Background Technology

[0002] A laser beam splitter is an extremely important optical component, whose main function is to split a laser beam into two or more beams. How is this amazing optical phenomenon achieved? This is where its unique beam-splitting film comes in.

[0003] A special beam-splitting film is carefully deposited on the optical surface of the laser beam-splitting plane mirror. This allows incident light to be reflected and transmitted separately in specific proportions. The beam-splitting film is the core component of the laser beam-splitting plane mirror, and the entire beam-splitting process is based on the reflection and transmission characteristics of light.

[0004] Through meticulous design of the beam splitter, its reflectivity and transmittance are precisely adjusted. For example, when the reflectivity of the beam splitter is set to a certain value, the transmittance is correspondingly determined according to pre-calculation. In this way, when a laser beam is incident on the plane mirror, it will be split into reflected light and transmitted light according to the characteristics of the beam splitter, and the ratio between the two will exactly meet the design requirements.

[0005] This precise light distribution capability plays an irreplaceable role in many fields. Whether it is the precise distribution of signals in laser communication or the rational planning of energy flow in laser processing, the laser beam splitter plays a crucial role. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a blue light splitting filter for use in lasers.

[0007] A blue light beam-splitting filter for use in lasers includes a base layer structure located in the middle.

[0008] A first beam-splitting film structure layer is provided at the first end of the base structure;

[0009] A second beam-splitting film structure layer is provided at the second end of the base structure;

[0010] The first beam-splitting film structure layer consists of 10 layers of high-refractive-index film structure and low-refractive-index film structure stacked alternately from the inside to the outside;

[0011] The first spectral splitting film structure layer is as follows:

[0012] Basic structure

[0013] / 23.15nmH / 77.59nmmL / 48.93nmH / 77.38nmmL / 48.81nmH / 77.41nmmL / 74.84nmH / 112.86nmmL / 65.88nmH / 64.28nmmL / air

[0014] The second beam-splitting film structure layer consists of six layers of high-refractive-index film structure and low-refractive-index film structure that are alternately stacked from the inside out;

[0015] The second spectral splitting film structure layer is as follows:

[0016] Base layer structure / 7.82nmH / 42.79nmmL / 33.76nmH / 15nmmL / 46.71nmH / 80.71nmmL / air;

[0017] Where H represents a high refractive index film structure, L represents a low refractive index film structure, and the nanometers before H and L represent the thickness of the corresponding film structure.

[0018] In a preferred embodiment of this utility model, the high refractive index film structure is a film structure made of tantalum pentoxide (TA2O5).

[0019] In a preferred embodiment of this utility model, the low refractive index film structure is a film structure made of silicon dioxide (SiO2).

[0020] In a preferred embodiment of this utility model, the base structure is a quartz base structure.

[0021] In a preferred embodiment of this utility model, the quartz material is Herlix SUP-313.

[0022] In a preferred embodiment of this utility model, the operating wavelength of the blue light splitter filter is 445±10nm.

[0023] The beneficial effects of this utility model are as follows:

[0024] The present invention provides a blue light splitting filter for lasers that splits reflected light and transmitted light into a splitting ratio of 70%:30% in the working wavelength band of 445±10nm. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a schematic diagram illustrating the effect of an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] like Figure 1 The blue light splitter filter shown includes a base structure 100 located in the middle, which is a Herringbone SUP-313 quartz.

[0030] A first spectral splitting film structure layer 200 is provided at the first end of the base structure 100.

[0031] A second beam-splitting film structure layer 300 is provided at the second end of the base structure 100.

[0032] In this embodiment, the first spectral splitting film structure layer 200 consists of 10 layers of high-refractive-index film structures and low-refractive-index film structures that are alternately stacked from the inside out. Here, the refractive index film structure and the low-refractive-index film structure are relative terms.

[0033] The high refractive index film structure is a film structure made of tantalum pentoxide (TA2O5).

[0034] The low refractive index film structure is a film structure made of silicon dioxide (SiO2).

[0035] The first spectral splitting film structure layer 200 in this embodiment is specifically as follows:

[0036] Basic structure

[0037] / 23.15nmH / 77.59nmmL / 48.93nmH / 77.38nmmL / 48.81nmH / 77.41nmmL / 74.84nmH / 112.86nmmL / 65.88nmH / 64.28nmmL / air.

[0038] In this embodiment, the second beam-splitting film structure layer 300 consists of six layers of high-refractive-index film structure and low-refractive-index film structure that are alternately stacked from the inside out. Here, the refractive index film structure and low-refractive-index film structure are relative terms.

[0039] The high refractive index film structure is a film structure made of tantalum pentoxide (TA2O5).

[0040] The low refractive index film structure is a film structure made of silicon dioxide (SiO2).

[0041] The second beam-splitting film structure layer 300 in this embodiment is specifically as follows:

[0042] Base structure / 7.82nmH / 42.79nmmL / 33.76nmH / 15nmmL / 46.71nmH / 80.71nmmL / air.

[0043] Where H represents a high refractive index film structure, L represents a low refractive index film structure, and the nanometers before H and L represent the thickness of the corresponding film structure.

[0044] The damage threshold of the blue light spectrophotometer of this invention is ≥20 J / cm. 2 .

[0045] The blue light splitter filter of this invention has a high damage threshold and can withstand high-power lasers, such as lasers exceeding 5000 watts, thus avoiding damage to the film layer.

[0046] The blue light splitting filter of this invention has a low absorptivity of no more than 10 ppm, indicating that the absorptivity of the splitting film to laser light is extremely low, reducing energy loss and achieving good splitting effect in the working wavelength band of 445±10 nm.

[0047] This invention achieves the reflectivity and transmittance of the beam-splitting film through design. For example, the reflectivity of the first beam-splitting film structural layer is R = 70% ± 1%, and the transmittance is T = 30% ± 1%.

[0048] The second beam splitting film structure layer has a reflectivity of R<0.3% and a transmittance of T>99.7% to optimize the blue light beam splitting filter to achieve better beam splitting effect in the working wavelength band of 445±10nm, and splits the light into reflected light and transmitted light according to a beam splitting ratio of 70%:30%.

[0049] The above shows and describes the basic principles, main features, and advantages of this utility model.

[0050] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of this utility model as defined by the appended claims and their equivalents.

Claims

1. A blue light dichroic filter for use with a laser, characterized by, The base structure is located in the middle, A first light splitting film structure layer is arranged at the first end of the base structure; A second light splitting film structure layer is arranged at the second end of the base structure; The first light splitting film structure layer is composed of 10 layers of high refractive index film structure and low refractive index film structure alternately stacked from inside to outside; The first light splitting film structure layer is specifically as follows: Base structure / 23.15nmH / 77.59nmL / 48.93nmH / 77.38nmL / 48.81nmH / 77.41nmL / 74.84nmH / 112.86nmL / 65.88nmH / 64.28nmL / air The second light splitting film structure layer is composed of 6 layers of high refractive index film structure and low refractive index film structure alternately stacked from inside to outside; The second light splitting film structure layer is specifically as follows: Base structure / 7.82nmH / 42.79nmL / 33.76nmH / 15nmL / 46.71nmH / 80.71nmL / air Wherein, H represents a high refractive index film structure, L represents a low refractive index film structure, and the nanometer number before H and L is the thickness of the corresponding film structure.

2. A blue light filter for use with a laser as claimed in claim 1, wherein, The high refractive index film structure is a film structure made of tantalum pentoxide TA2O5.

3. The blue light splitting filter for laser according to claim 1, wherein The low refractive index film structure is a film structure made of silicon dioxide SIO2.

4. The blue light filter for use with a laser as claimed in claim 1, wherein, The base structure is a base structure made of quartz.

5. The blue light splitting filter for laser according to claim 4, wherein The quartz material is HELI SUP-313.

6. The blue light splitting filter for laser according to claim 1, wherein The working wavelength range of the blue light splitting filter is 445±10nm.

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