Tiêu chuẩn iso 14490 3 2016

© ISO 2016 Optics and photonics — Test methods for telescopic systems — Part 3 Test methods for telescopic sights Optique et photonique — Méthodes d’essai pour systèmes télescopiques — Partie 3 Méthod[.]

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Optics and photonics — Test methods

Part 3:

Optique et p oto ique — Méth des d’e s sai p ur systèmes

téle sco iques —

Partie 3: Méth de s d’e ssai p ur viseurs de tir

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written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

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F reword v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms and definitions 1

4 Metho of me surement of ax ial paralax 1

4.1 Principle 1

4.2 Tes arrang ement 2

4.2.1 General 2

4.2.2 C l mator 2

4.2.3 Telesco ic sight 2

4.2.4 Dio tric tes e 2

4.3 Measur ement pr oc d r e 3

4.4 Tes rep rt 3

5 Metho of me sur ement of paral ax 3

5.1 Principle 3

5.2.1 General 3

5.2.2 C l mator 4

5.2.4 Light s o 4

5.2.5 Aux ilary telesco e 4

5.4 Tes rep rt 6

6 Metho of me sur ement of eye relef rang e 6

6.1 Principle 6

6.2 Tes arrang ement

6 6.2.1 General 6

6.2.2 C l mator 6

6.2.4 Measuring mag nifie 6

6.4 Tes rep rt 8

7 Metho of me sur ement of r eticle tracking 8

7.1 Principle 8

7.2.1 General 8

7.2.2 C l mator 8

7.3 Tes pr oc d re 9

7.4 Tes rep rt 9

8 Metho of me sur ement of lne of sight shif due to zo ming 9

8.1 Principle 9

8.2.1 General 9

8.2.2 Tes spe imen mou ting 1

8.2.3 Aux ilary telesco e 1

8.3 Tes pr oc d re 1

8.3.1 Pr ep ration of the tes as embly 1

8.3.2 Dete mination of the measur ement v lues 1

8.4 Pr ecision of the measurement 1

8.5 Tes rep rt 1

9 Metho of me surement of lne of sight shif due to focusing 12

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9.1 Principle 1

9.2.1 General 1

9.2.2 C l mator 1

9.2.4 Auxi ary telesco e 14

9.3 Tes pr oc d r e 14

9.3.1 Pr ep ration of the tes as embly 14

9.3.2 Dete mination of the measur ement v lues 14

9.4 Pr ecision of the measur ement 14

9.5 Tes r ep rt 1

10 General test repor t 15

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ISO (he Int ernational Org nization for Stan ardization) is a worldwide fede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Standards is normaly car ied out

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org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that ome of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sp nsible for identifying any or al such p t ent right Detais of

any p t ent right identif ied d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe if ic t erms an ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the fol owing URL: F or word - Sup lementary information

The committ ee r sponsible for this document is ISO/TC 1 2, Optic s a d p oto ic s , Subcommitt ee SC 4,

Telesc opic sys tems

This se on edition canc ls an r plac s the firs edition (ISO 14 9 -3:2 04 ), w hich has be n

t ech icaly r vised with the folowing chang es:

a) Clause 9 “Method of measur ment of l ne of sight shif d e t o focusing” was ad ed;

b) thet erm “ ma nif ication” was r plac d b “ ma nifying powe ” in v rious ins anc s

ISO 1449 consis s of the folowing p rt , u de the g ene al title Optic s a d p oto ic s — Tes t meth ds

fr telesc opic sys tems:

— Part 1: Tes t meth ds fr b s ic charac te i s tic s

— Part 2 : Tes t meth ds fr bin c ular sys tems

— Part 3 : Tes t meth ds fr teles c opic s ig ts

— Part 4 : Tes t meth ds fr as tro omic al teles c opes

— Part 5: Tes t meth ds fr tra s mit a c e

— Part 6 : Tes t meth ds fr vei n glar index

— Part 7: Tes t meth ds fr lmit o r s olutio

— Part 8: Tes t meth ds fr nig t-v i s ion dev ic es

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Optics and photonics — Test methods for telesc opic

Part 3:

This p rt of ISO 1449 spe ifiest es eq ipment an t es proc d r s for det ermination of the folowing

o tical charact eris ics of t elesco ic sight :

— a ial p rala ;

— parala ;

— eye r l ef rang e;

— r ticle tracking;

— l ne of sight shif d e t o zo ming;

— l ne of sight shif d e t o focusing

2 Normati ve r eferences

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

ISO 141 2 1, Optic s a d p oto ic s — Voc ab lar y fr teles c opic sys tems — Part 1: G ene al te ms a d

alp a etic al indexes o te ms in ISO 1413 2

ISO 1 41 2 3, Optic s a d p oto ic s — Vocab lar y fr te lescopic sys te ms — Part 3 : Te rms fr te lesc opic s ig t

ISO 14 13 –1:2 14, Opti cs a d p oto i cs — S e ifi cati ons fr teles co i c si ght s — Par t 1: Gene al

p r pose instr ument s

ISO 1413 – 2:2 14, Optics a d p oto ics — S ec ific ations fr teles c opic s ights — Part 2 :

High-performa c e ins ruments

3 Terms and definitions

F or the purp ses of this document, the t erms and definitionsgiven in ISO 141 2-1 an ISO 1 41 2-3 a ply

4 Method ofmeasur ement of ax ial paral ax

4.1 Principle

This t es method desc ibes the measur ment of the a ial dis anc betwe n the r ticle of a t elesco ic

sight an an imag e, formed b the o je tive lens of this t elesco ic sight (w he e the r ticle is in the f irs

imag e plane) or b the o je tive lens and e e ting sy st em (w he e the r ticle is in the se on imag e

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plane) The dis anc between the r ticle of the t elesco ic sight an imag e plane of the col mat or r ticle

along the o tical a is p′

a

isex r s ed in dio tr s (m

−

) an measur d with theauxi iary t elesco e

4.2 Test arrang ement

4.2.1 General

Measur ment of the a ial p rala shal be car ied out with the t es ar ang ement hown in Figur 1

It shal be p s ible t o adjus the algnment of the col mat or an the t elesco ic sight r lative t o each

othe This can be achieved b adjus ing the col mat or an / r the t elesco ic sight

Key

Figure 1 — Test ar ang ement for me suring axial paral ax

4.2.2 C l imator

The col mat or shal ha e a useful diamet er larg er than the o je tive lens diamet er of the t elesco ic

sight u de t es an a focal length of at leas t en times the diamet er of the col mat or lens

The r ticle of the col mat or should ha e g eometric featur s a pro riat e t o as es the ofset, e.g a

c os -hair The a ial p sition of this r ticle shal be cor e tly adjust ed t o form an imag e at he spe if ied

paral a -fr e dis anc of the t elesco ic sight u de t es

Thei lumination u it shal c eat e a u iform brightnes o e the a e tur of thecol imat or

To avoid chromatic a e rations, a gr en filt er (a pro imat ely 0,5 µm)shal be used

4.2.3 Telesc opic sight

The t elesco ic sight an / r the col mator shal be adjust ed r lative t o each othe so that b th o tical axes

ar p ralel an in such a p sition that the o je tive lens of the telesco ic sight is completely i luminat ed

Thec ntr of the r ticle of the t elesco ic sight shal be near the o tical a is of the sight

4.2.4 Dio tr ic tester

The dio tric t est er shal ha e an a e tur larg er than the exit pupi of the t elesco ic sight an a

ma nifying p wer suff icient t o ensur a pr cise measur ment ( i.e × t o × )

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4.3 Measurement pr oc edure

S t he dio tric t est er t o z ro with it eyepie e adjust ed t o o tain a sharp imag e of it own r ticle

The eyepie e of the t elesco ic sight shal be focused on the r ticle of the t elesco ic sight t o o tain a

sharp imag e w hie viewing through the dio tric t est er

F r telesco ic sight with fixed eyepie e, use the dio tric tes e to focus on the r ticle of the

telesco ic sight

The dio tr set ing of the dio tric tester shal be adjust ed to o tain a sharp image of the col mator eticle

The a ial p rala in the imag e sp c , p′

a, shal be det ermined b the dife enc of the two r adings on

the dio tric t est er

The unc rtainty of measur ment or p′

a(ex r s ed in m

w he e D’ is the exit pupi diamet er of the t elesco ic sight ex r s ed in metr s

F or exit pupi diamet ers larg er than 7 mm, the v lue in the formula shal be D′ = 7 mm

The a ial paral a in the o je t sp c , p

a, is calculat ed as given in F rmula (2):

w he e Γ is the ma nifying p wer of the t elesco ic sight un e t es

NOTE T e ima e q ality of the test setu (inclu ing the teles opic sight u der test) influences the

me surement er or

4.4 Test repor t

A t es r port shal be pr sent ed an shal inclu e the g ene al information spe if ied in Cla use 1 an the

r sult of the t es as spe ified in 4.3

5 Method ofmeasur ement of paral ax

Measur ment of the p rala shal be car ied out with the t es ar ang ement hown in Figur 2

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1 2 3 4

Key

Figure 2 — Test ar ang ement for me suring paralax

5.2.2 C l imator

The col mat or shal ha e a useful diamet er larg er than the o je tive lens diamet er of the t elesco ic

sight u de t es an a focal length of at leas t en times the diamet er of the col mat or lens

The r ticle of the col mat or should ha e g eometric featur s a pro riat e t o as es the ofset, e.g a

c os -hair The a ial p sition of this r ticle shal be cor e tly adjust ed t o form an imag e at he spe if ied

paral a -fr e dis anc of the t elesco ic sight u de t es

The i umination u it shal c eat e a u iform brightnes o e the a e tur of the col imat or To a oid

chromatic a e rations, a gr en filt er (a pro imat ely 0,5 µm)shal be used

5.2.3 Telesc opic sight

The t elesco ic sight and /or the col mator shal be adjust ed r lative t o each othe so that b th o tical axes

ar p ralel an in such a p sition that the o je tive lens of the telesco ic sight is completely i luminat ed

Thec ntr of the r ticle of the t elesco ic sight shal be near the o tical a is of the sight

5.2.4 Light stop

The lght st op shal ha e a diamet er, d, in mi imetr s, ( e Figur 2) of d = (1,2 ± 0,1) Γ w he e Γ is the

ma nifying p wer of the t elesco ic sight u de t es

The l ght st op shal be adjus a le in a horizontal dir ction o e the w hole diamet er of the entranc

pupi of the t elesco ic sight

5.2.5 Aux ilar y telesc ope

The auxi iary t elesco e shal ha e an a e tur larg er than the exit pupi of the t elesco ic sight an a

ma nification sufficient t o ensur a pr cise measur ment

The auxi ary t elesco e r ticle shal ha e a scale in min t es of ar on it horizontal a is, with

subdivisions of at mos 2min t es of ar (MOA)

The auxi iary t elesco e shal be focused t o inf inity

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5.3 Measurement pr oc edure

The eyepie e of the t elesco ic sight shal be focused on the r ticle of the t elesco ic sight t o o tain a

sharp imag e w hie viewing through the auxi ary t elesco e

A djus the lght st op t o two o p sit e p sitions, so that in each of them, it out er edg ecor esp n s t o the

edg e of the entranc pupi of the t elesco ic sight

Use the a uxi ary telesco e to det ermine the change, α, in MOA, of the angular deviation betwe n the

images of the col mator r ticle an the t elesco ic sight r ticle in the two lght stop p sitions ( e Figur 3)

2 3

1

α

Key

1 teles opic sight

2 reticle of teles opic sig ht

3 imag e plane of colimator r eticle

α chang e, in MOA , of the ang ular deviation b tween the imag es of the colimator r eticle an the teles opic sight

reticle in the two lig ht stop positions

Figure 3 — Ex lanation of me surement of q antity α

The p ral a p′ in the imag e sp c is calculat ed as given in F ormula (3):

w he e Γ is the ma nifying p wer of the t elesco ic sight un e t es

The unc rtainty of measur ment or p′ shal not ex ce d 1,0MOA

NOT For practical p rposes, the relations b twe n paral a an a ial paral a are giv en by the

fol owing formula :

343 , e pres ed in min tes of ar

where D′ is the e it p pil diameter, e pres ed in mil imetres

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5.4 Test report

A t es r port hal be pr sent ed an shal inclu e the g ene al information spe if ied in Clause 1 an the

r sult of the t es as spe if ied in 5.3

6 Method ofmeasurement of eye r el efrang e

6.1 Pr inciple

This method desc ibes the det ermination of that eye p sition rang e along the o tical a is of a t elesco ic

sight, w hich s i l alows o se v tion of the ful f ield of view

F or this method, a mean day light eye pupi of 3 mm in diamet er is as umed

F or an i us ration of eye r lef rang e, se Figur 4 F or documentation purp ses, the eye r lef rang e is

Measur ment of the eye r lef rang e shal be car ied out with the t es ar ang ement shown in Figur 4

6.2.2 C l imator

The col mat or shal ha e a useful diamet er larg er than that of the o je tive lens of the t elesco ic sight

un e t es an a focal length of at leas t en timesthe diamet er of the col imat or lens

The col imat or shal ha e two p int-sha ed lght sour espositioned in the focal plane of the col mat or

In the case of a t elesco ic sight without paral a adjus ment, the two point-sha ed lght sour es shal

be positioned in such wa that their imag es a pear in the p ral a -fr e dis anc These l ght sour es

shal be adjus a le symmetricaly a out the o tical a is in cor espon enc t o the field of view ofthe

t elesco ic sight

To a oid chromatic a e ration, a gr en f ilt er (a pro imat ely 0,5 µm) shal beused

6.2.3 Telesc opic sig ht

The r ticle of the t elesco ic sight shal be near the o tical a is of the sight The t elesco ic sight shal be

adjus a le r lative t o the col mat or arou d two mutualy orthog onal ax es lying in a plane pe pen icular

t o theo tical a is

6.2.4 Me sur ing mag nifier

The measuring ma nifie should ha e a ma nifying p we of a pro imat ely t en times an a r ticle with

a grad ation of 0,1 mm The grad at ed side of the r ticle is p sitioned as close t o the difusing surfac

of the sc e n asp s ible

The o tical a is of the measuring ma nif ie is positioned p ralel t o the o tical a is of the t elesco ic

sight an adjus a le in the a ial dir ction

Tiêu đề	Test methods for telescopic sights
Trường học	International Organization for Standardization
Chuyên ngành	Optics and photonics
Thể loại	Tiêu chuẩn
Năm xuất bản	2016
Thành phố	Geneva

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