CN205809411U - A kind of contrast continuously adjusts grating - Google Patents

Abstract

This utility model one contrast continuously adjusts grating and belongs to optics, field of precision instruments；This contrast continuously adjusts grating, including setting up and down the first sinusoidal grating that direction is identical, the cycle is identical and the second sinusoidal grating, described first sinusoidal grating and the adverse movement under the regulation of grating governor motion of the second sinusoidal grating, described grating governor motion is provided power by the power transmission being arranged on base；By controlling the rotation of motor in power transmission, drive drive rod rotation, and then drive rotation of turning, the external part on turning drive the first sinusoidal grating and the second sinusoidal grating adverse movement, it is achieved dutycycle continuously adjusts；Under structure of the present utility model, motor can be controlled the most at any time and rotate, make the first sinusoidal grating and the continuous adverse movement of the second sinusoidal grating, it is achieved contrast regulates the most in real time.

Description

A kind of contrast continuously adjusts grating

Technical field

One contrast of the present invention continuously adjusts grating and belongs to optics, field of precision instruments.

Background technology

The optics being made up of a large amount of wide equally spaced parallel slits is referred to as grating.Conventional grating is at sheet glass On carve a large amount of parallel scores and make, indentation is lightproof part, and the smooth part between two indentations can be equivalent to narrow with printing opacity Slot array.Although grating structure is uncomplicated, but in numerous optical instruments, it is respectively provided with extensively application, also plays crucial work With.

The grating carved on the glass sheet, owing to transmitance will not change, the therefore contrast under identical intensity of illumination Degree is fixed value, if it is possible to change contrast in application process as required, then this grating will have more extensive Application, play bigger effect, play more revolutionary impact.But, the most not finding contrast can continuously adjust Grating.

Summary of the invention

For the problems referred to above, the invention discloses a kind of contrast and continuously adjust grating, it is possible to realize contrast and adjust continuously The technical purpose of joint.

A kind of contrast continuously adjusts grating, including setting up and down the first sinusoidal grating that direction is identical, the cycle is identical With the second sinusoidal grating, described first sinusoidal grating and the adverse movement under the regulation of grating governor motion of the second sinusoidal grating, Described grating governor motion is provided power by the power transmission being arranged on base；

Described first sinusoidal grating is arranged between two the first supports by linear bearing, two described the first supports Being symmetrically mounted on base, described linear bearing is able to ensure that the first sinusoidal grating horizontal in-plane moving at level altitude；The One sinusoidal grating bottom symmetrical arranges two first drive links with groove；Described second sinusoidal grating is pacified by linear bearing Being contained between two the second supports, two described the second supports are symmetrically mounted on base, and described linear bearing is able to ensure that Second sinusoidal grating is at the horizontal in-plane moving of level altitude；Second sinusoidal grating bottom symmetrical arranges two and has the of groove Two drive links；

Described grating governor motion is made up of symmetrically arranged two clamp mechanisms, and each clamp mechanism includes that two are coaxially disposed Turn, described in turn by be arranged on base turn support support；Two turn between connected by rotating shaft, each turn Outside be provided with external part, be positioned at same clamp mechanism two turn on two external parts be arranged on diameter of section of turning Two ends, the external part being positioned at outside inserts in the groove of the first drive link, and the external part being positioned at inner side inserts the second drive link In groove；

Described power transmission includes motor and the drive link rotated with motor coaxle, and described drive link is by being arranged on the end Transmission bracket on seat supports, and drive link is connected with shaft bearing or belt connects, and imparts power to rotating shaft.

Above-mentioned contrast continuously adjusts grating,

Turning and supported by the support of turning being arranged on base, concrete structure is: bearing between support of turning and turn Connecting, turn and bearing inner ring interference fit, support of turning is fixing with outer race to be connected；

Drive link is supported by the transmission bracket being arranged on base, and concrete structure is: between drive link and transmission bracket Bearing connects, drive link and bearing inner ring interference fit, and transmission bracket is fixing with outer race to be connected.

Above contrast continuously adjusts grating, is additionally provided with light source below the second sinusoidal grating.

Between the second sinusoidal grating and light source, it is additionally provided with diffusing transmission plate.

A kind of above-mentioned contrast continuously adjust on grating realize contrast method for continuously adjusting, by electric machine rotation, Drive drive rod rotation, and then drive rotation of turning, the external part on turning drive the first sinusoidal grating and the second sinusoidal light Grid adverse movement, it is achieved contrast continuously adjusts.

Above-mentioned contrast method for continuously adjusting, comprises the following steps:

Step a, adjust the first sinusoidal grating and the second sinusoidal grating

Same clamp mechanism two turn on two external parts in the case of being positioned at same perpendicular, make first sinusoidal Grating and the second sinusoidal grating overlap；

Step b, according to equation below, adjust contrast

$k=\frac{1}{2}\sqrt{{C_1}^2+{C_2}^2+2C_1{C}_{2}cos\left(lsin\mathrm{\α}\right)}$

Wherein, k is contrast, C₁It is the contrast of the first sinusoidal grating, C₂Being the contrast of the second sinusoidal grating, l is same One clamp mechanism two turn on the wheelbase of two external parts, α is the corner of motor；

Concrete derivation is:

The light intensity expression of the first sinusoidal grating is:

The light intensity expression of the second sinusoidal grating is:

After motor turns over α angle, the light intensity expression of the first sinusoidal grating is:

After motor turns over α angle, the light intensity expression of the second sinusoidal grating is:

Normalization light intensity expression after synthesis is:

Then contrast is:

$\begin{array}{c}\frac{1}{2}\sqrt{{(C_1+C_2)}^2{\cos }^2\left(\frac{l}{2}sin\mathrm{\α}\right)+{(C_1-C_2)}^2{\sin }^2\left(\frac{l}{2}sin\mathrm{\α}\right)}\\ =\frac{1}{2}\sqrt{{C_1}^2+{C_2}^2+2C_1{C}_{2}cos\left(lsin\mathrm{\α}\right)}\end{array}$

Above-mentioned contrast method for continuously adjusting, comprises the following steps:

Step a, adjust the first sinusoidal grating and the second sinusoidal grating

Same clamp mechanism two turn on two external parts in the case of being positioned at same perpendicular, make first sinusoidal Grating and the second sinusoidal grating overlap；

Step b, according to equation below, adjust contrast

$k=Ccos\left(\frac{l}{2}sin\mathrm{\α}\right)$

Wherein, k is contrast, and C is the first sinusoidal grating and the contrast of the second sinusoidal grating, and l is same clamp mechanism two Individual turn on the wheelbase of two external parts, α is the corner of motor；

Concrete derivation is:

The light intensity expression of the first sinusoidal grating and the second sinusoidal grating is:

After motor turns over α angle, the light intensity expression of the first sinusoidal grating is:

After motor turns over α angle, the light intensity expression of the second sinusoidal grating is:

Normalization light intensity expression after synthesis is:

Then contrast is:

$Ccos\left(\frac{l}{2}sin\mathrm{\α}\right)$

Beneficial effect: under the structure of the present invention, it is only necessary to control motor and rotate, it becomes possible to make the first sinusoidal grating and the Two sinusoidal grating adverse movements, and then realize contrast adjustment；Simultaneously as the first sinusoidal grating and the fortune of the second sinusoidal grating Dynamic track is continuous print, and therefore contrast adjustment is also continuous print；And during using, due to can be according to actual needs Controlling motor at any time to rotate, therefore contrast adjustment is real-time；In sum, the present invention has contrast and regulates the most in real time Technical advantage.

Accompanying drawing explanation

Fig. 1 is the structural representation that contrast of the present invention continuously adjusts grating specific embodiment one.

Fig. 2 is the structural representation that contrast of the present invention continuously adjusts grating specific embodiment three.

Fig. 3 is the structural representation that contrast of the present invention continuously adjusts grating specific embodiment four.

In figure: 11 first sinusoidal gratings, 12 second sinusoidal gratings, 13 first supports, 14 second supports, 15 first transmissions Bar, 16 second drive links, 2 grating governor motions, 21 turn, 22 rotating shafts, 23 external parts, 24 turn support, 3 power transmission dresses Put, 31 motors, 32 drive links, 33 transmission bracket, 4 bases, 5 light sources, 6 diffusing transmission plates.

Specific embodiment

Below in conjunction with the accompanying drawings the specific embodiment of the invention is described in further detail.

Specific embodiment one

The present embodiment is the embodiment that contrast continuously adjusts grating.

The contrast of the present embodiment continuously adjusts grating, and structural representation is as shown in Figure 1.This contrast continuously adjusts grating Including setting up and down the first sinusoidal grating 11 and the second sinusoidal grating 12 that direction is identical, the cycle is identical, described first is sinusoidal Grating 11 and second sinusoidal grating 12 adverse movement under the regulation of grating governor motion 2, described grating governor motion 2 is by installing Power transmission 3 on base 4 provides power；

Described first sinusoidal grating 11 is arranged between two the first supports 13 by linear bearing, described two first Support 13 is symmetrically mounted on base 4, and described linear bearing is able to ensure that first sinusoidal grating 11 horizontal plane at level altitude Interior motion；First sinusoidal grating 11 bottom symmetrical arranges two first drive links 15 with groove；Described second sinusoidal grating 12 are arranged between two the second supports 14 by linear bearing, and two described the second supports 14 are symmetrically mounted on base 4, Described linear bearing is able to ensure that the second sinusoidal grating 12 horizontal in-plane moving at level altitude；Bottom second sinusoidal grating 12 It is symmetrical arranged two second drive links 16 with groove；

Described grating governor motion 2 is made up of symmetrically arranged two clamp mechanisms, and each clamp mechanism includes that two coaxially set That puts turns 21, described in turn and 21 supported by the support 24 of turning being arranged on base 4；Turn between 21 by rotating shaft 22 for two Connect, each turn 21 outside be provided with external part 23, be positioned at two external parts that same clamp mechanism two is turned on 21 23 two ends being arranged on 21 diameter of sections of turning, the external part 23 being positioned at outside inserts in the groove of the first drive link 15, is positioned at The external part 23 of inner side inserts in the groove of the second drive link 16；

Described power transmission 3 includes motor 31 and the drive link 32 with motor 31 coaxial rotating, described drive link 32 Being supported by the transmission bracket 33 being arranged on base 4, drive link 32 is connected with rotating shaft 22 bearing or belt connects, and is transmitted by power To rotating shaft 22.

Specific embodiment two

The present embodiment is the embodiment that contrast continuously adjusts grating.

The contrast of the present embodiment continuously adjusts grating, on the basis of specific embodiment one, further defines that

Turning and 21 supported by the support 24 of turning being arranged on base 4, concrete structure is: turn 21 with support 24 of turning Between bearing connect, turn and 21 fix is connected with bearing inner ring interference fit, turn support 24 and outer race；

Drive link 32 is supported by the transmission bracket 33 being arranged on base 4, and concrete structure is: drive link 32 props up with transmission Between frame 33, bearing connects, drive link 32 and bearing inner ring interference fit, and transmission bracket 33 is fixing with outer race to be connected.

Specific embodiment three

The present embodiment is the embodiment that contrast continuously adjusts grating.

The contrast of the present embodiment continuously adjusts grating, and structural representation is as in figure 2 it is shown, this contrast continuously adjusts light Grid, on the basis of specific embodiment one, limit further below the second sinusoidal grating 12 and are additionally provided with light source 5.

This structure designs so that contrast of the present invention continuously adjusts grating and can directly coordinate light source 5 to use, it is not necessary to Additional light source.

Specific embodiment four

The present embodiment is the embodiment that contrast continuously adjusts grating.

The contrast of the present embodiment continuously adjusts grating, and structural representation is as it is shown on figure 3, this contrast continuously adjusts light Grid, on the basis of specific embodiment three, are limited between the second sinusoidal grating 12 and light source 5 further, are additionally provided with unrestrained saturating Penetrate plate 6.

Light source 5 sends light beam, after diffusing transmission plate 6, then is irradiated on the second rectangular raster 12, and this structure designs, The illumination light that can make the second rectangular raster 12 is more uniform, it is possible to solve to reduce asking of experiment effect because illumination light is uneven Topic.

Specific embodiment five

The present embodiment is the embodiment of contrast method for continuously adjusting.

The contrast method for continuously adjusting of the present embodiment, is rotated by motor 31, drives drive link 32 to rotate, and then drives Turn 21 rotations, the external part 23 turned on 21 drive the first sinusoidal grating 11 and the second sinusoidal grating 12 adverse movement, real Existing contrast continuously adjusts.

Specific embodiment six

The present embodiment is the embodiment of contrast method for continuously adjusting.

The contrast method for continuously adjusting of the present embodiment, on the basis of specific embodiment five, limit further include with Lower step:

Step a, adjust the first sinusoidal grating 11 and the second sinusoidal grating 12

Same clamp mechanism two two external parts 23 on 21 of turning, in the case of being positioned at same perpendicular, make first Sinusoidal grating 11 and the second sinusoidal grating 12 overlap；

Step b, according to equation below, adjust contrast

$k=\frac{1}{2}\sqrt{{C_1}^2+{C_2}^2+2C_1{C}_{2}cos\left(lsin\mathrm{\α}\right)}$

Wherein, k is contrast, C₁It is the contrast of the first sinusoidal grating 11, C₂It is the contrast of the second sinusoidal grating 12, l For the wheelbase of two external parts 23 that same clamp mechanism two is turned on 21, α is the corner of motor 31；

Concrete derivation is:

The light intensity expression of the first sinusoidal grating 11 is:

The light intensity expression of the second sinusoidal grating 12 is:

After motor 31 turns over α angle, the light intensity expression of the first sinusoidal grating 11 is:

After motor 31 turns over α angle, the light intensity expression of the second sinusoidal grating 12 is:

Normalization light intensity expression after synthesis is:

Then contrast is:

$\begin{array}{c}\frac{1}{2}\sqrt{{(C_1+C_2)}^2{\cos }^2\left(\frac{l}{2}sin\mathrm{\α}\right)+{(C_1-C_2)}^2{\sin }^2\left(\frac{l}{2}sin\mathrm{\α}\right)}\\ =\frac{1}{2}\sqrt{{C_1}^2+{C_2}^2+2C_1{C}_{2}cos\left(lsin\mathrm{\α}\right)}\end{array}$

The contrast method for continuously adjusting of the present embodiment, continuously adjusts grating based on contrast of the present invention, gives contrast Corresponding relation between degree and motor 31 corner, experiment base has been established in the concrete operations for contrast method for continuously adjusting of the present invention Plinth.

Specific embodiment seven

The present embodiment is the embodiment of contrast method for continuously adjusting.

The contrast method for continuously adjusting of the present embodiment, on the basis of specific embodiment five, limit further include with Lower step:

Step a, adjust the first sinusoidal grating 11 and the second sinusoidal grating 12

Same clamp mechanism two two external parts 23 on 21 of turning, in the case of being positioned at same perpendicular, make first Sinusoidal grating 11 and the second sinusoidal grating 12 overlap；

Step b, according to equation below, adjust contrast

$k=Ccos\left(\frac{l}{2}sin\mathrm{\α}\right)$

Wherein, k is contrast, and C is the first sinusoidal grating 11 and contrast of the second sinusoidal grating 12, and l is same handset Structure two is turned the wheelbase of two external parts 23 on 21, and α is the corner of motor 31；

Concrete derivation is:

The light intensity expression of the first sinusoidal grating 11 and the second sinusoidal grating 12 is:

After motor 31 turns over α angle, the light intensity expression of the first sinusoidal grating 11 is:

After motor 31 turns over α angle, the light intensity expression of the second sinusoidal grating 12 is:

Normalization light intensity expression after synthesis is:

Then contrast is:

$Ccos\left(\frac{l}{2}sin\mathrm{\α}\right)$

The contrast method for continuously adjusting of the present embodiment, continuously adjusts grating based on contrast of the present invention, gives contrast Corresponding relation between degree and motor 31 corner, experiment base has been established in the concrete operations for contrast method for continuously adjusting of the present invention Plinth.

Claims (4)

1. a contrast continuously adjusts grating, it is characterised in that include that direction setting up and down is identical, the cycle is identical first Sinusoidal grating (11) and the second sinusoidal grating (12), described first sinusoidal grating (11) and the second sinusoidal grating (12) are adjusted at grating Adverse movement under the regulation of joint mechanism (2), described grating governor motion (2) is by the power transmission being arranged on base (4) (3) power is provided；

Described first sinusoidal grating (11) is arranged between two the first supports (13) by linear bearing, described two first Support (13) is symmetrically mounted on base (4), and described linear bearing is able to ensure that the first sinusoidal grating (11) is at level altitude Horizontal in-plane moving；First sinusoidal grating (11) bottom symmetrical arranges two first drive links (15) with groove；Described Two sinusoidal gratings (12) are arranged between two the second supports (14) by linear bearing, and two described the second supports (14) are right Claiming to be arranged on base (4), described linear bearing is able to ensure that the second sinusoidal grating (12) is transported in the horizontal plane of level altitude Dynamic；Second sinusoidal grating (12) bottom symmetrical arranges two second drive links (16) with groove；

Described grating governor motion (2) is made up of symmetrically arranged two clamp mechanisms, and each clamp mechanism includes that two are coaxially disposed Turn (21), described in turn (21) supported by the support of turning (24) that is arranged on base (4)；Turn logical between (21) for two Crossing rotating shaft (22) to connect, each outside turning (21) is provided with external part (23), is positioned at same clamp mechanism two and turns (21) two external parts (23) on are arranged on the two ends of (21) diameter of section of turning, and the external part (23) being positioned at outside inserts the In the groove of one drive link (15), the external part (23) being positioned at inner side inserts in the groove of the second drive link (16)；

Described power transmission (3) includes motor (31) and the drive link (32) with motor (31) coaxial rotating, described transmission Bar (32) is supported by the transmission bracket (33) being arranged on base (4), and drive link (32) is connected or belt with rotating shaft (22) bearing Connect, impart power to rotating shaft (22).

Contrast the most according to claim 1 continuously adjusts grating,

It is characterized in that,

Turn (21) supported by the support of turning (24) that is arranged on base (4), concrete structure is: turns (21) and turns Between frame (24), bearing connects, turn (21) and bearing inner ring interference fit, and support of turning (24) is fixing with outer race to be connected；

Drive link (32) is supported by the transmission bracket (33) being arranged on base (4), and concrete structure is: drive link (32) and biography Between dynamic support (33), bearing connects, drive link (32) and bearing inner ring interference fit, and transmission bracket (33) is solid with outer race Fixed connection.

Contrast the most according to claim 1 and 2 continuously adjusts grating, it is characterised in that under the second sinusoidal grating (12) Side is additionally provided with light source (5).

Contrast the most according to claim 3 continuously adjusts grating, it is characterised in that at the second sinusoidal grating (12) and light Between source (5), it is additionally provided with diffusing transmission plate (6).