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  • DCV-Lenses-CaF2-1

Calcium Fluoride (CaF2)
Bi-Concave Lenses

Bi-concave los yog Ob-concave (DCV) lo ntsiab muag yog cov lo ntsiab muag tsis zoo uas yog tuab ntawm ntug dua li nyob rau hauv nruab nrab, thaum lub teeb dhau los ntawm lawv, nws diverges thiab qhov tsom xam yog virtual. Bi-Concave lo ntsiab muag muaj qhov sib npaug ntawm lub vojvoog ntawm curvature ntawm ob sab ntawm qhov muag pom, lawv qhov ntev focal yog qhov tsis zoo, nrog rau lub voj voog ntawm curvature ntawm qhov chaw nkhaus. Tsis zoo focal ntev ua rau collimated teeb meem teeb meem mus rau diverge, lawv feem ntau yog siv los diverge ib convergent beam. Vim lawv cov yam ntxwv, ob-concave lo ntsiab muag feem ntau yog siv los nthuav lub teeb nyob rau hauv Galilean-type beam expanders los yog ua kom muaj txiaj ntsig zoo ntawm lub lens converging los ntawm kev siv ua khub hauv cov tshuab uas twb muaj lawm xws li lub teeb pom kev zoo. Lawv kuj tseem siv tau thaum nws los txog rau kev txo cov duab. Hauv cov tshuab kho qhov muag, nws yog ib qho kev xaiv lawv cov optics ua tib zoo kom cov aberrations qhia los ntawm qhov zoo- thiab qhov tsis zoo-focal-ntev lo ntsiab muag kwv yees li tshem tawm. Cov lo ntsiab muag tsis zoo no feem ntau yog siv hauv telescopes, koob yees duab, lasers lossis tsom iav los pab cov tshuab ua kom pom tseeb dua.

Bi-concave lo ntsiab muag (los yog ob-concave lo ntsiab muag) yog qhov kev xaiv zoo tshaj plaws thaum cov khoom thiab cov duab nyob ntawm qhov sib piv ntawm cov khoom sib txawv (cov khoom sib nrug los ntawm cov duab disdance) ze rau 1: 1 nrog converging input beams, xws li cov ntaub ntawv nrog bi-convex lo ntsiab muag. Lawv yog siv rau replay imaging (virtual object thiab duab) daim ntaub ntawv. Thaum qhov xav tau qhov kev nthuav dav yog tsawg dua 0.2 lossis ntau dua 5, cov lo ntsiab muag plano-concave feem ntau tsim nyog.

Vim nws cov kis tau tus mob siab ntawm 0.18 µm mus rau 8.0 μm, Calcium fluoride nthuav tawm qhov ntsuas qis qis sib txawv ntawm 1.35 txog 1.51 thiab feem ntau yog siv rau cov ntawv thov uas xav tau kev sib kis loj hauv infrared thiab ultraviolet spectral ranges, nws muaj refractive index 6 4 ntawm 1.40. µm. CaF2 kuj tseem muaj tshuaj lom neeg tsis zoo thiab muaj cov tawv tawv zoo dua piv rau nws cov barium fluoride, thiab magnesium fluoride cov kwv tij. Nws tsis tshua muaj siab laser kev puas tsuaj pib ua rau nws siv tau nrog excimer lasers. Paralight Optics muaj Calcium Fluoride (CaF2) Bi-concave lo ntsiab muag nrog antireflection txheej rau ob qho tib si 3 mus rau 5 µm wavelength ntau yam. Cov txheej no zoo heev txo qhov nruab nrab qhov cuam tshuam ntawm cov substrate tsawg dua 2.0%, yielding qhov nruab nrab kis tau tus mob ntau dua 96% hla tag nrho AR txheej. Tshawb xyuas cov duab hauv qab no rau koj cov ntaub ntawv siv.

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Nta:

Khoom siv:

Calcium Fluoride (CaF2)

Muaj:

Uncoated los yog nrog Antireflection Coatings

Focal Lengths:

Muaj los ntawm -15 mus rau -50 mm

Daim ntawv thov:

Haum rau siv hauv Excimer Laser Applications, hauv Spectroscopy thiab Txias Thermal Imaging

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Common Specifications:

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Reference Drawing rau

Ob chav-Concave (DCV) Lens

f: Focal Length
fb: Rov qab Focal Length
ff: Pem hauv ntej Focal Length
R: Radius ntawm Curvature
tc: Center Thickness
te: Ntug Thickness
H”: Rov Qab Tus Thawj Coj Dav Hlau

Lus Cim: Lub focal ntev yog txiav txim siab los ntawm lub dav hlau sab nraum qab, uas tsis tas yuav kab nrog ntug thickness.

Tsis muaj

Ntau Yam & Tolerances

  • Cov khoom siv substrate

    Calcium Fluoride (CaF2)

  • Hom

    Ob chav-Concave (DCV) Lens

  • Index ntawm Refraction

    1.428 @ Nd:Yag 1.064 μm

  • Abbe Number (Vd)

    95.31 ib

  • Thermal Expansion Coefficient (CTE)

    18.85 x 10-6/ ℃

  • Txoj kab uas hla Tolerance

    Precision: +0.00/-0.10mm | Siab Precise: +0.00/-0.03 hli

  • Thickness kam rau ua

    Precision: +/- 0.10 hli | Siab Precise: +/- 0.03 hli

  • Focal Length kam rau ua

    +/- 2%

  • Surface Quality (scratch-dig)

    Nqe: 80-50 | Siab Precise: 60-40

  • Spherical Surface Power

    3 hl/2

  • Deg Irregularity (Peak rau Valley)

    hl/2

  • Qhov chaw

    Qhov tseeb:<3 arcmin | Siab Precison: <1 arcmin

  • Clear Aperture

    90% ntawm txoj kab uas hla

  • AR Txheej ntau yam

    3-5 m

  • Kev xa tawm dhau txheej txheej (@ 0 ° AOI)

    Tus nqi> 95%

  • Reflectance dhau txheej txheej (@ 0 ° AOI)

    Ravg<2.0%

  • Tsim Wavelength

    588nm ua

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Cov duab

♦ Transmission nkhaus ntawm uncoated CaF2 substrate: siab kis tau tus mob ntawm 0.18 mus rau 8.0 μm
♦ Kev xa tawm nkhaus ntawm AR-coated CaF2 Lens: Tavg> 95% dhau ntawm 3 - 5 μm ntau yam
♦ Kev xa tawm nkhaus ntawm kev txhim kho AR-coated CaF2 Lens: Tavg> 95% dhau ntawm 2 - 5 μm ntau yam

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Transmission Curve ntawm AR-coated (3 µm - 5 μm) CaF2 Lens

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Transmission Curve of Enhanced AR-coated (2 µm - 5 μm) CaF2 Lens

Yam khoom

Ntaus nkag mus tshawb lossis ESC kom kaw