LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

Qualitative measurement of beam collimation
Applicable beam diameter 1 mm-25.4 mm with four types available
Magnetic mounting design of shear plate for quick replacement

The LBTEK shearing interferometer consists of a 45°-positioned wedge prism and an observation plate, where the wedge prism is made of UV-grade fused silica, and the observation plate is a scattering plate with a reference line engraved in the center. The wedge angle of each prism is optimized for the measurable beam size, and the specific angles can be found in the specifications. The scattering plate is used to observe the interference fringes generated by the Fresnel reflections from the front and rear surfaces of the wedge prism. The fringe intensity is maximized when the polarization direction of the incident beam is perpendicular to the plane of incidence (the plane formed by the incident ray and the normal of the shearing plate). Note that interference fringes can only be observed if the coherence length of the laser beam is greater than the optical path difference (OPD) introduced by the wedge prism. The approximate OPD (ΔOPL) generated by the wedge prism can be found in the specifications of each product. The LBTEK shearing interferometer can be used for qualitative analysis of beam collimation. For further inquiries, please contact LBTEK Technical Support.

Shearing interferometer

Qualitative analysis of beam collimation
Beam diameter measurement range 1 mm-25.4 mm with four types available
Magnetic mounting design for shear plate allows quick replacement

The LBTEK shearing interferometer consists of a circular wedge prism placed at 45° and an observation plate, which can qualitatively analyze the collimation of the light beam. Depending on the shearing plate, it is divided into four models suitable for beam diameters of 1 mm-3 mm, 2.5 mm-5 mm, 5 mm-10 mm, and 10 mm-25.4 mm. For other requirements, please contact LBTEK Technical Support.

Note: Due to the thicker optical elements of the TSI100 and TSI254 shearing interferometers, their rear surfaces protrude beyond the mounting substrate plane. Therefore, when installing or removing the shearing plate, please move it smoothly along the axial direction to avoid collisions with adjacent components. Especially when the system is already equipped with a TSICP/TSICP-SM1 cage adapter plate, it is recommended to remove peripheral components before operating the shearing plate assembly.

Shearing interferometer bases featuring magnetic posts and positioning spheres

Product Model	Applicable beam diameter	Shearing Plate	Unit Price	Lead Time
TSI030	1 mm-3 mm	TSIP030	$390.65	6 weeks
TSI050	2.5 mm-5 mm	TSIP050	$402.55	6 weeks
TSI100	5 mm-10 mm	TSIP100	$419.03	6 weeks
TSI254	10 mm-25.4 mm	TSIP254	$422.03	7 weeks

Shearing plate

4 cutting templates, suitable for beam diameters from 1 mm to 25.4 mm
Magnetic mounting design for quick and easy replacement

The wedge angle of the wedge prism used in LBTEK's shearing plates has been optimized for different beam diameters. Specific wedge angle values can be found in the parameters below. The shear plates feature a magnetic mounting design, simplifying the replacement process and enabling quick changes. Based on applicable beam diameters, the shearing plates are categorized into four models: 1 mm-3 mm, 2.5 mm-5 mm, 5 mm-10 mm, and 10 mm-25.4 mm. For other requirements, please contact LBTEK Technical Support.

Note: Due to the thicker optical elements in TSIP100 and TSIP254 shear plates, their rear surfaces protrude beyond the mounting substrate plane (as shown in the right figure). Therefore, when installing or removing these shear plates, please move them smoothly along the axial direction to avoid collisions with adjacent components.

Shearing plates featuring magnetic posts and positioning spheres

Product Model	Applicable beam diameter	Wedge prism wedge angle	Unit Price	Lead Time
TSIP030	1 mm-3 mm	117 arcsec	$141.72	6 weeks
TSIP050	2.5 mm-5 mm	83 arcsec	$153.62	6 weeks
TSIP100	5 mm-10 mm	40 arcsec	$169.18	6 weeks
TSIP254	10 mm-25.4 mm	18 arcsec	$187.22	7 weeks

Beam Observation Assembly

Increased stripe size available on the observation board
Applicable beam diameter range 1 mm-10 mm

The shear interferometer magnification observation system provided by LBTEK can enlarge the interference fringes of small-aperture beams, facilitating the evaluation of the beam's collimation. LBTEK also offers the mounting plate for this magnification observation system separately. The mounting plate features SM1 internal threads, making it compatible with all LBTEK components that have SM1 threading.

Shearing interferometer with beam observation assembly

	Product Model	Included Observation Accessories	Size	Unit Price	Compare	Lead Time
	TSIOS	Yes	Ø30.5 mm × 50 mm	$283.32		6 weeks
	TSIOSMP-SM1	No	50.8 mm × 48.3 mm × 5.1 mm	$56.74		6 weeks

30mm coaxial system adapter plate

Integration of a shearing interferometer into a coaxial system
available in configurations with and without an observation screen

LBTEK offers two types of coaxial system adapter plates: one with an observation screen and one without. The version with an observation screen allows direct viewing of interference fringes; the version without an observation screen features SM1 internal threads for integrating other observation systems. For other requirements, please contact LBTEK Technical Support.

Compatible with 30 mm coaxial system

	Product Model	Included Observation Accessories	Shear Interferometer Compatible	Unit Price	Compare	Lead Time
	TSICP-SM1	No	TSI030/TSI050/TSI100/TSI254	$64.72		6 weeks
	TSICP	Yes	TSI030/TSI050/TSI100/TSI254	$70.08		6 weeks