CN214751009U

CN214751009U - Single-side diffraction optical element

Info

Publication number: CN214751009U
Application number: CN202120944184.2U
Authority: CN
Inventors: 陶郑洲; 周照宇; 叶子君
Original assignee: Ningbo Optical Core Micro Optoelectronic Technology Co ltd
Current assignee: Ningbo Optical Core Micro Optoelectronic Technology Co ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-11-16
Anticipated expiration: 2031-05-06

Abstract

The utility model relates to a single face diffraction optical element, including diffraction lens, protection lens, tectorial membrane fibre drier piece, the top middle part of diffraction lens is equipped with micro-nano structure portion, and the top edge of diffraction lens is equipped with the support ring, and the optical cement for the protection lens is on the support ring top, and one side of support ring is equipped with the through-hole that runs through the support ring, and the drier ring in the through-hole is rolled up along the support ring inside wall to one end of tectorial membrane fibre drier piece, and the other end of tectorial membrane fibre drier piece is rolled up outer drier ring along the support ring outside wall. The beneficial effects are that: utilize tectorial membrane fibre drier piece to form interior drier ring at the support ring inside wall, absorb the steam between diffraction lens and the protection lens, play drying effect, utilize the spacing drier piece of tectorial membrane to form outer drier ring at the support ring lateral wall, prevent that steam from getting into between diffraction lens and the protection lens to avoid steam to influence the diffraction lens normal work between diffraction lens and protection lens.

Description

Single-side diffraction optical element

Technical Field

The utility model relates to a diffraction optical element technical field especially relates to a single face diffraction optical element.

Background

Diffractive optical elements cause changes in optical properties due to the presence of moisture. At the same time, such changes can cause safety issues, such as eye injury and/or reduced system performance due to exposure to deflected laser light, and damage to the eye due to light focusing. It is therefore important to exclude as much moisture as possible, both during the process flow and during use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above problem that prior art exists, provide a single face diffraction optical element.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

the utility model provides a single face diffraction optical element, includes diffraction lens, protection lens, tectorial membrane fibre drier piece, the top middle part of diffraction lens is equipped with micro-nano structure portion, the top edge of diffraction lens is equipped with the support ring, the protection lens is pasted on the support ring top with the optical cement, one side of support ring is equipped with the through-hole that runs through the support ring, the drier ring in rolling along the support ring inside wall after passing the through-hole is worn to one end of tectorial membrane fibre drier piece, another end of tectorial membrane fibre drier piece rolls into outer drier ring along the support ring outside wall.

Furthermore, a limiting ring is arranged between the micro-nano structure part and the support ring at the top end of the diffraction lens, and the difference value between the inner diameter of the support ring and the outer diameter of the limiting ring is two times of the thickness of the coated fiber drying agent sheet.

Furthermore, the top end of the support ring is provided with a conical surface which inclines downwards from inside to outside, the bottom end of the protective lens is provided with a buckling groove matched with the conical surface, and the conical surface is coated with a layer of optical cement and then clamped in the buckling groove.

Furthermore, an upper limiting flange is arranged on the outer side of the protective lens, a lower limiting flange is arranged on the outer side of the diffraction lens, the upper limiting flange is parallel to the lower limiting flange, and the outer desiccant ring is located between the upper limiting flange and the lower limiting flange.

Furthermore, a protective sleeve is further screwed on the diffraction lens and sleeved outside the outer desiccant ring.

Further, the height of the inner desiccant ring is smaller than that of the support ring, and the height of the outer desiccant ring is larger than that of the support ring.

The utility model has the advantages that: set up the support ring at the top edge of diffraction lens, utilize tectorial membrane fibre drier piece at the support ring inside wall in the drier ring forms, absorb the steam between diffraction lens and the protection lens, play drying effect, utilize the spacing drier piece of tectorial membrane to form outer drier ring at the support ring lateral wall, prevent that steam from getting into between diffraction lens and the protection lens to avoid steam to influence the normal work of diffraction lens between diffraction lens and protection lens.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural diagram of a single-sided diffractive optical element according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a diffractive lens according to a first embodiment of the present invention;

FIG. 3 is a schematic structural view of a coated fibrous desiccant sheet according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a protective lens according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a single-sided diffractive optical element in a second embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1 to 4, in a first embodiment, a single-sided diffractive optical element includes a diffractive lens 1, a protective lens 2, and a coated fiber desiccant sheet 3, a micro-nano structure portion 4 is disposed in a middle portion of a top end of the diffractive lens 1, a support ring 5 is disposed on a top end edge of the diffractive lens 1, the protective lens 2 is attached to a top end of the support ring 5 by an optical adhesive, a through hole 6 penetrating through the support ring 5 is disposed on one side of the support ring 5, one end of the coated fiber desiccant sheet 3 is rolled into an inner desiccant ring 7 along an inner side wall of the support ring 5 after passing through the through hole 6, and the other end of the coated fiber desiccant sheet 3 is rolled into an outer desiccant ring 8 along an outer side wall of the support ring 5.

Set up the support ring at the top edge of diffraction lens, utilize tectorial membrane fibre drier piece at the support ring inside wall in the drier ring forms, absorb the steam between diffraction lens and the protection lens, play drying effect, utilize the spacing drier piece of tectorial membrane to form outer drier ring at the support ring lateral wall, prevent that steam from getting into between diffraction lens and the protection lens to avoid steam to influence the normal work of diffraction lens between diffraction lens and protection lens.

A limiting ring 9 is arranged between the micro-nano structure part 4 and the support ring 5 at the top end of the diffraction lens 1, the difference value between the inner diameter of the support ring 5 and the outer diameter of the limiting ring 9 is twice the thickness of the coated fiber drying agent piece 3, and the height of the limiting ring 9 is half of the height of the support ring 5. When the membrane-coated fiber desiccant sheet is replaced, one end of the membrane-coated fiber desiccant sheet is convenient to roll into an inner desiccant ring along the inner wall of the support ring.

The top of support ring 5 is equipped with from inside to outside slant downward conical surface 10, and the bottom of protection lens 2 is equipped with catching groove 11 with conical surface 10 complex, scribbles in people's catching groove 11 behind the one deck optical cement of coating on conical surface 10. The optical cement is prevented from flowing into the micro-nano structure part of the diffraction lens.

The outer side of the protection lens 2 is provided with an upper limit flange 12, the outer side of the diffraction lens 1 is provided with a lower limit flange 13, the upper limit flange 12 is parallel to the lower limit flange 13, and the outer desiccant ring 8 is positioned between the upper limit flange 12 and the lower limit flange 13. The outer desiccant ring plays a role of being fixed on the support.

The inner desiccant ring 7 has a height less than the height of the support ring 5 and the outer desiccant ring 8 has a height greater than the height of the support ring 5.

The second embodiment shown in fig. 5 is different from the first embodiment in that a protective sleeve 14 is further screwed on the diffraction lens 1, and the protective sleeve 14 is sleeved outside the outer desiccant ring 8. The outer desiccant ring is protected.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A single-sided diffractive optical element, characterized by: including diffraction lens, protection lens, tectorial membrane fibre drier piece, the top middle part of diffraction lens is equipped with micro-nano structure portion, the top edge of diffraction lens is equipped with the support ring, the optical cement for the protection lens pastes on the support ring top, one side of support ring is equipped with the through-hole that runs through the support ring, drier ring in the through-hole back is passed along support ring inside wall batching to one end of tectorial membrane fibre drier piece, another of tectorial membrane fibre drier piece is coiled along support ring outside wall and is become outer drier ring.

2. The single-sided diffractive optical element according to claim 1, characterized in that: a limiting ring is arranged between the micro-nano structure part and the support ring at the top end of the diffraction lens, and the difference value between the inner diameter of the support ring and the outer diameter of the limiting ring is two times of the thickness of the coated fiber drying agent sheet.

3. The single-sided diffractive optical element according to claim 1, characterized in that: the top of support ring is equipped with the downward conical surface of inside to outside slant, the bottom of protection lens is equipped with the catching groove with conical surface complex, scribble in the card people catching groove behind the one deck optical cement on the conical surface.

4. The single-sided diffractive optical element according to claim 1, characterized in that: the outer side of the protective lens is provided with an upper limiting flange, the outer side of the diffraction lens is provided with a lower limiting flange, the upper limiting flange is parallel to the lower limiting flange, and the outer desiccant ring is located between the upper limiting flange and the lower limiting flange.

5. The single-sided diffractive optical element according to claim 1, characterized in that: and the diffraction lens is also in threaded connection with a protective sleeve, and the protective sleeve is sleeved outside the outer desiccant ring.

6. The single-sided diffractive optical element according to claim 1, characterized in that: the height of the inner desiccant ring is smaller than that of the support ring, and the height of the outer desiccant ring is larger than that of the support ring.