Products HomeZerodur®広帯域誘電体ミラー
- Lower Coefficient of Thermal Expansion Than Fused Silica
- >99% Reflectance Over Specified Spectral Ranges
- Four Broadband Coatings Available
- Available in Ø1/2", Ø1", and Ø2" Sizes
BB0511-E02
Ø1/2" Mirror
BB111-E03
Ø1" Mirror
BB211-E04
Ø2" Mirror
BB111-E01
Ø1" Mirror
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特長
- 非常に低い熱膨張係数
- 4種類の広帯域コーティング:
- 350～400 nm
- 400～750 nm
- 750～1100 nm
- 1280～1600 nm
- 入射角0～45°のS偏光ならびにP偏光のRavg＞99%
- Ø12.7 mm(Ø1/2インチ)、Ø25.4 mm(Ø1インチ)、Ø50.8 mm(Ø2インチ)の3サイズをご用意
- CWおよびナノ秒レーザに対応
Zerodur®*(ゼロデュア)の熱膨張係数は0 ± 0.100 x 10-6 /°Cで、溶融石英の熱膨張係数0.55 x 10-6 /°Cよりも著しく低い値となっております。この特性によりこちらのミラーは工業加工用レーザなどの高出力システムほか、温度の変化によるビームドリフトに敏感な用途に適しています。Zerodurミラーは、広帯域コーティング付きでご用意しており、350 nm～400 nm、400～750 nm、750～1100 nmまたは1280 nm～1600 nmのスペクトル範囲内で優れた反射率を有します(入射角8°における比較は下記のプロット図をご参照ください)。なおロット毎のバラツキにより、規定したコーティングのスペクトル範囲は、実効的な範囲よりも狭く記載されています。実効的なスペクトル範囲の端付近でのミラーの典型的な反射特性は、「反射率グラフ」タブのプロット図でご覧いただけます。
各ミラーの裏面には、右の写真のように型番が刻印されています。
より広い範囲で高反射率と低熱膨張の特性が必要な用途には、金属コーティング付きZerodurミラーのラインナップもご用意しております。また、ミラーコーティング無しの Zerodur® ミラーブランクもご用意しております。熱膨張の考慮が必要のない用途には、標準的な広帯域誘電体ミラー、金属コーティング付きミラーほか、様々な用途に適したミラーをご用意しております。なお、こちらのミラーは超短パルスレーザには適しておりません。ピコ秒やフェムト秒パルスレーザ向けには当社の低GDD超短パルスレーザ用ミラーをご検討ください。
*Zerodur® はSchott社の登録商標です。
| Mirror Specifications | ||
|---|---|---|
| Substratea | Zerodur® | |
| Surface Flatness | λ/10 @ 632.8 nm (Peak to Valley) | |
| Surface Quality | 10-5 Scratch-Dig | |
| Back Surface | Fine Ground | |
| Clear Aperture | > 85% of Diameter | |
| Parallelism | ≤3 arcmin | |
| Thickness | Ø1/2" Optics | 6.0 mm (0.24") |
| Ø1" Optics | 6.0 mm (0.24") | |
| Ø2" Optics | 12.0 mm (0.47") | |
| Thickness Tolerance | ±0.2 mm | |
| Diameter Tolerance | +0.0 mm / -0.1 mm | |
| Coating Specifications | |||||
|---|---|---|---|---|---|
| Item # Suffix | -E01 | -E02 | -E03 | -E04 | |
| Wavelength Range | 350 - 400 nm | 400 - 750 nm | 750 - 1100 nm | 1280 - 1600 nm | |
| Reflectancea (Click for Graph) | Rsand Rp >99% | Rsand Rp >99% | Rsand Rp >99% | Rs and Rp >99% | |
プロット図では、誘電体コーティングの反射率の典型値を示しています。グラフの網掛け部分は、このコーティングの反射率が非常に高いスペクトル範囲を示しています。ロット毎にバラツキがあるため、実際には、この推奨スペクトル範囲よりも広い範囲で高い反射率を示します。このデータの解釈について疑問点がありましたら当社にお問い合わせください。2種類の誘電体コーティングのスペクトル範囲をまたぐ必要のある温度の変動に敏感な用途には、 金属コーティング付きZerodurミラーをご検討ください。
-E01コーティング(350～400 nm)
-E02コーティング(400～750 nm)
-E03コーティング(750～1100 nm)
-E04コーティング(1280～1600 nm)
| Posted Comments: | |
Arto Salokatve
(posted 2023-11-09 11:40:44.537) What are the damage thresholds for this mirror operated with CW lasers ? jdelia
(posted 2023-11-10 08:23:36.0) Thank you for contacting Thorlabs. Unfortunately, we do not currently have enough data to characterize formal damage threshold ratings for these mirrors. I have reached out to you directly to discuss the suitability of these mirrors for your laser beam parameters. Veselin Aleksandrov
(posted 2023-01-27 12:53:47.577) Hello! Do you have an estimation of the absorption (in %) of the -E03 coating for CW laser beam at wavelength around 800 nm and incidence angles around 0? I want to estimate the heat induced surface deformations of a mirror with this coating. Thank you in advance! ksosnowski
(posted 2023-02-03 05:59:28.0) Hello Veselin, thanks for reaching out to Thorlabs. While we have not directly measured the absorption in these coatings, for the -E03 coating we have sampled some transmission data, and at 800nm and 0deg incidence the transmission is ~0.03%, which is very low. You can estimate the absorption as (1-%T-%R) for this coating. I have reached out directly to discuss this further. user
(posted 2022-12-19 17:14:07.933) Normal silver mirror(PF10-03-P01), I have experienced weakness in humidity,
We are considering buying some mirrors with zerodur glass substrates. Would you please share the information about (Humidity, Temperature) damage threshold values of BB1-E03 mirrors? ksosnowski
(posted 2022-12-28 04:06:56.0) Thanks for reaching out to Thorlabs. Silver mirror coatings are particularly sensitive to humidity and will have limited lifetime in moist environments as the coating tarnishes. Dielectric mirror coatings have significantly better lifetime than silver in elevated temperature and humidity conditions. Zerodur substrate can additionally help with issues of thermal expansion, though even fused silica substrate dielectrics may be an option for your application if humidity is the largest concern. We do not have formal damage thresholds for temperature or humidity, but the dielectric coatings are typically deposited at least at 200 degrees C, and batches are tested at 95% humidity according to MIL-PRF-13830B. pervin tüzün
(posted 2021-06-30 23:00:07.587) Dear authorities,
We are considering buying some dielectric coated mirrors with zerodur glass substrates. Would you please share the information about damage threshold values of BB1-E01, BB1-E02, BB1-E03 mirrors?
Sincerely.
Thank you. YLohia
(posted 2021-06-30 10:37:49.0) Hello, as mentioned in the comment below, unfortunately, we do not currently have enough data to characterize formal damage threshold ratings for these mirrors. I have reached out to you directly to discuss the suitability of these mirrors for your laser beam parameters. Van Rudd
(posted 2020-04-27 19:38:15.137) What are the damage thresholds for these coatings? YLohia
(posted 2020-04-29 08:35:52.0) Thank you for contacting Thorlabs. Unfortunately, we do not currently have enough data to characterize formal damage threshold ratings for these mirrors. I have reached out to you directly to discuss the suitability of these mirrors for your laser beam parameters. Chris McGahan
(posted 2019-09-17 13:13:45.557) On your page: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=9640
The first graph visible shows Reflectance vs Wavelength. The wavelength units are shown as nm. Do you mean um? YLohia
(posted 2019-09-17 02:43:43.0) Hello, thank you for your feedback and pointing out this error. We are working on updating the units to microns immediately. |
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