CN202676972U

CN202676972U - Adjustable normal lens

Info

Publication number: CN202676972U
Application number: CN201220338248.5U
Authority: CN
Inventors: 李静
Original assignee: Maolai (Nanjing) Instrument Co Ltd
Current assignee: Maolai (Nanjing) Instrument Co Ltd
Priority date: 2012-07-13
Filing date: 2012-07-13
Publication date: 2013-01-16
Anticipated expiration: 2022-07-13

Abstract

An adjustable normal lens is characterized by comprising a lens cone (1), a first lens (3), a second lens (4), a third lens (5), a fourth lens (6), pressing rings (2) and a lens seat (7). The first lens (3), the second lens (4) and the third lens (5) are all arranged inside the lens cone (1) and fixed through glue. The outer ends of the first lens (3) are positioned by the pressing rings (2). The pressing rings (2) are screwed inside the lens cone (1) in a threaded way. The fourth lens (6) is arranged on the lens seat (7) which is screwed inside the lens cone (1). The normal lens provided by the utility has a simple structure and is convenient to manufacture. Meanwhile, the manufacturing and assembling precision can be increased. Thus the normal lens has an enhanced market competitive edge.

Description

Adjustable standard lens

Technical field

The utility model relates to a kind of optical measurement camera lens, especially a kind of face shape and the measuring accurate camera lens of interferometry of optical system wavefront etc., specifically a kind of adjustable standard lens for high-precision optical element.

Background technology

At present, conventional optical lens only need to be put into part according to the assembling drawing usually successively, fixes with trim ring or with glue more at last, and the interval between the optical element is all fixed, and assembles relatively simple.But overlap with the centre of sphere of reference surface for the focus that requires whole group of optical system, allowing only is the accurate camera lens of 0.5 λ-1.5 λ, and this structure just is difficult to guarantee to reach the front required value of complex wave.

Summary of the invention

The purpose of this utility model be existing standard lens because adjusting the problem that is difficult to reach error requirements, design a kind of adjustable standard lens, to satisfy the performance index of standard lens.

The technical solution of the utility model is:

A kind of adjustable standard lens, it is characterized in that it is comprised of lens barrel 1, lens 1, lens 24, lens 35, lens 46, trim ring 2 and microscope base 7, described lens 1, lens 24 and lens 35 are installed in the lens barrel 5 and with glue to be fixed, locate with trim ring 2 outer end of described lens 1, trim ring 2 passes through the screw thread spinning in lens barrel 1, lens 46 are installed on the microscope base 7, and microscope base 7 spinnings are in lens barrel 1.

Described microscope base 7 is provided with a guide ledges 8, and this guide ledges 8 is inserted in the guiding endoporus of lens barrel 1.

The beneficial effects of the utility model:

The utility model adopts adjustable lens construction, and it is non-adjustable thoroughly to have solved existing standard lens, the problem that precision is difficult to improve, and it has realized the requirement of precision before the complex wave by be installed in the position of adjusting microscope base on the microscope base with reference to lens four.

The utility model is simple in structure, and is easily manufactured, can improve the manufacturing assembly precision.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in Figure 1.

A kind of adjustable standard lens, it is comprised of lens barrel 1 and four lens 1, lens 24, lens 35, lens 46 and trim ring 2 microscope bases 7, described lens 1, lens 24 and lens 35 are installed in the lens barrel 5 and with glue to be fixed, locate with trim ring 2 outer end of described lens 1, trim ring 2 passes through the screw thread spinning in lens barrel 1, lens 46 are installed on the microscope base 7, microscope base 7 spinnings are in lens barrel 1, described microscope base 7 is provided with a guide ledges 8, and this guide ledges 8 is inserted in the guiding endoporus of lens barrel 1.As shown in Figure 1.

As seen from Figure 1, total of the present utility model is that lens one, two, three usefulness glue are fixed in the lens barrel, and with trim ring pushing down gently, lens 4 usefulness glue are fixed in the microscope base at last, by the axis hole guiding of φ 87 and being threaded of M104*0.75.

Lens one, two, three and lens barrel metal working part be plane-plane contact, be the most stable a kind of structure.Tolerance on fit Gap-Ratios radially is looser, adjust again the center to setting after the gluing when requiring assembling, wait again it to solidify, can reduce to greatest extent like this metal working part inwall and contact the stress that produces with the optical element external diameter, and guarantee that lens can not move when being subject to greater impact or vibrations.In addition, the fixing stress that has also reduced the different materials contact and produced of spacer ring that need not be conventional with glue, stability is better.Lens four (reference surface) are the most responsive a slice lens, the requirement of microscope base is also relatively higher, material selection be the little stainless steel of good stability and expansion coefficient (the lens barrel material can adopt aluminium alloy), φ 87 shaft hole matchings only have positive and negative 2, and (± 0.02mm) tolerance, the M104*0.75 threaded engagement is closely comfortable.Simultaneously take the hole of dress lens four as benchmark, cooperate the right alignment requirement of the cylindrical of the φ 87 that play the guiding role and the screw thread of the M104*0.75 that is connected with lens barrel in 0.005mm, to guarantee the center of whole arrangement of mirrors head with the lens barrel endoporus.After optical element all installs adhesive curing, on the screw thread of the M104*0.75 of microscope base, be coated with uniformly last layer silica gel, again the microscope base lens barrel of packing into, before the screw thread that cooperates by the front and back adjustment is regulated airspace between lens three and the lens four and adjusted complex wave, generally to reach between 0.5 λ-1.5 λ.Elder generation's coarse adjustment is finely tuned when interferometer is seen numerical value near required value again during adjustment, can alter a great deal before screw thread moves forward and backward several microns complex waves usually, so after adjusting, be placed in the special-purpose box, waiting period, solidify, after placing a week, retest again, prevent numerical value change.

To note during assembling and setting following some: 1, shaft hole matching is tighter, needs veteran assembly crewman, blocks when preventing from assembling;

2, camera lens will shift to an earlier date 12 hours and be placed on the testing apparatus room, keep constant temperature, otherwise measuring error can be very large;

3, environment wants quiet, is selected in the test in evening as far as possible, and noisy environment can have a great impact test;

4, debugging shows when reaching requirement numerical value, survey several times more, if repeatedly all be qualified just passable, otherwise will again debug;

5, assembling will be carried out in 1000 grades clean room, and dust or wiping agent can be influential to measuring.

The utility model does not relate to partly all, and the prior art that maybe can adopt same as the prior art is realized.

Claims

1. adjustable standard lens, it is characterized in that it is comprised of lens barrel (1), lens one (3), lens two (4), lens three (5), lens four (6), trim ring (2) and microscope base (7), described lens one (3), lens two (4) and lens three (5) are installed in the lens barrel (5) and with glue to be fixed, locate with trim ring (2) outer end of described lens one (3), trim ring (2) passes through the screw thread spinning in lens barrel (1), lens (four) (6) are installed on the microscope base (7), and microscope base (7) spinning is in lens barrel (1).

2. adjustable standard lens according to claim 1 is characterized in that described microscope base (7) is provided with a guide ledges (8), and this guide ledges (8) is inserted in the guiding endoporus of lens barrel (1).