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Birefringent Material "Lithium Niobate"
Applications
- Digital Camera
- Digital Camera for Broadcast / Cinema
- Industrial Camera
- Surveillance Camera, etc.
[Photo 1: Lithium Niobate OLPF]
![[Photo 1: Lithium Niobate OLPF]](../../upload/optics/products/optics_lpf-ithium_img01.jpg)
Features
- Lithium niobate (LiNbO3) single crystal is used as the birefringent material [Photo 1].
- With a thickness of about 1/6 that of a quartz birefringence plate, the same ray separation width can be obtained [Photo 2].
[Photo 2: Comparison of Thickness Between Quartz Crystal and Niobate]
Left: Four Pieces of Quartz Crystals Bonded Together
Right: Four Pieces of Lithium Niobate Bonded Together
![[Photo 2: Comparison of Thickness Between Quartz Crystal and Niobate]Left: Four Pieces of Quartz Crystals Bonded Together Right: Four Pieces of Lithium Niobate Bonded Together](../../upload/optics/products/optics_lpf-ithium_img02.jpg)
Standard Specifications
| Birefringence Plate Refractive Index | Ordinary rays no=2.3198、Abnormal rays ne=2.2308 |
|---|---|
| Ray Separation Width | Available in the range of 4.4μm or more. |
| External Dimensions | Available in the range of 10~60mm × 10~60mm. |
| External Dimensional Tolerance | Available in the range of ±0.1mm or more. |
| Thickness Per a Substrate | Available in the range of 0.135mm or more. |
| Thickness Dimension Tolerance | Available in the range of ±0.01mm or more. |
| AR Coat Reflectance | 1.0% Max.(420~700nm) When using BK7 etc. as a cover glass, 0.5% Max.(420~700nm) is guaranteed. |
| Bonding | If multi-pointseparation is required, two or substrates can be bonded together. |
External Dimensions
Supported Within the Dimensions Shown on the Right
We will consider requests for other external dimensions, so please feel free to contact us.
*Please inquire for special specifications.
Optical Characteristics Example
LiNbO3 Base Plate
OLPF
Warranty Items
Test items include temperature, humidity, impact resistance, heat resistance, etc. for the environmental and mechanical properties of optical components.
We set test items and conditions for each component and guarantee the properties of the component. However, warranty items and conditions vary depending on the shape, properties, application, and environment of the optical component.
| Subjected to High Temperature | 85℃ 1000H |
|---|---|
| Subjected to Low Temperature | -40℃ 1000H |
| Subjected to High Temperature and High Humidity | 60℃90％RH～95%RH 1000H |
| Heat Shock | -40℃ 2H 、85℃ 2H、100℃/H 10 Cycles |
| Subjected to Thermal Shock | -40℃/85℃ 30 Minutes Each 100 Cycles |
| Coating Adhesion Strength | Cellophane tape (LP-18) is applied to the component, rubbed with the fingers three times, and then quickly pulled off in a vertical direction ten times |
| Abrasion Resistance | The vapor-deposited surface is pressed with lens-cleaning paper (DUSPER K-3) with a pressing pressure of 4.9 N/cm2 (500 gf/cm2)
1 round-trip/second continuous, round-trip distance 10 mm, 100 round-trips |
| Solvent Resistance Test | Using lens-cleaning paper (DUSPEP K-3) in solvents such as IPA, acetone, ethanol, etc. with 2.94 N (300 gf) 1 round-trip/second continuous, round-trip distance 100 mm, 100 round-trips |
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