BETSA-Pressure Ruby Luminescence

BETSA®

[PRL]

Pressure Ruby Fluorescence

Optical Transfer

Its small size and weight make "on site" measurements possible.When equipped with an internal mini laser it functions as a "stand alone" instrument.

Choose and compose your own optical transfer

according to your needs

Pressure Ruby Luminescence - Optical Transfer

The [PRL] spectrometer (Pressure by Ruby Luminescence) has been designed for measuring pressures using the luminescence of a reference material (Ruby or SrB407 : Sm 2+).

Its small size and weight make "on site" measurements possible. When equipped with an internal mini laser it functions as a "stand alone" instrument.

Measurements are very easy and fast with custom high pressure calculation software.

Its small size and weight make "on site" measurements possible.

Download the PDF, then look on the following pages for the details of each component

you will be able to choose parts the optical transfer according to your needs, adapted for you experiments

To measure the pressure in the experimental volume, a technique based on ruby luminescence is used. This method involves the use of a laser, usually green or blue in color, to excite a ruby balls inserted into the volume of interest. The pressure of the volume is then determined by analysing the variation in the wavelength of the luminescence emitted by the ruby, which is directly influenced by the pressure exerted on it.

The observation of the experimental volume as well as the transfer of the laser and ruby beams are carried out by means of an optical transfer system, specifically a microscope. This optical transfer makes it possible to precisely visualise the experimental volume and to direct the laser and ruby beams towards the locations required to carry out the measurements. It also facilitates the transmission of the luminescence emitted by the ruby to the spectrometer.

In the context of this methodology, the spectrometer used is the BETSA® spectrometer [PRL]. It is integrated into the overall system and makes it possible to collect information on the luminescence of the ruby, by precisely analysing the wavelength emitted. This spectral analysis provides the data necessary to calculate the pressure exerted on the experimental volume.

Using this approach, scientists can obtain accurate pressure measurements in the study volume, exploiting the luminescence properties of ruby. This method offers high sensitivity and high resolution, allowing reliable and accurate measurements in a given pressure range. It is commonly used in many research fields, such as high pressure physics, geophysics, materials science, and many more.

In summary, pressure measurement by ruby luminescence is based on the excitation of a ruby balls using a laser, followed by the analysis of the variation in the wavelength of the luminescence emitted. by ruby under pressure. This technique is made possible thanks to an optical transfer system, using a microscope, to observe the experimental volume and direct the laser and ruby beams towards the areas of interest. The luminescence data is then collected and analysed using the BETSA® spectrometer to obtain precise pressure measurements.

Optical transfer base : [TRANS]

[TRANS00] is the basic element on which the inputs/outputs and other components are assembled.

This element is composed of two XY tables and contains internally a set of optical doublet and dichroic plate adapted to the laser for the transmission of the ruby and/or samarium fluorescence signal.

These elements are kept in a completely black cavity and very stable allowing easy movement.

Mounting Support : XYZ Stage [XYZ3]

The [XYZ3] is a holder featuring a 3 axis stage. It is used for positioning the MDAC high pressure cells (centering and focusing) on experiment setups.

Travel Sensitivity :
X= 6 mm. 250μm/turn.
Y= 6 mm. 250μm/turn.
Z= 8 mm. 250μm/turn.

External sizes :
H= 146 mm.
L= 65 mm.
Depth= 50 mm.

This 3 axis table can easily be adapted to any equipment (in addition to the MDAC) where micro-displacements are required.
(Only the 2 upper holders have to be modified).

Mounting Support : [V-BLOC]

the [V-BLOC] allows to maintain the [TRANS00] but can also be used to maintain the DACs and MDACs.

The Standard holding diameter is 50 mm, but it can be adapted for any other cell dimension

Output signal : Optical Fiber

The optical fibers offered by BETSA® are designed to fit between the optical transfer and the spectrometer manufactured by BETSA® or another company. These optical fibers are optimized for the passage of the fluorescence of ruby is where samarium.

The connection is made with an SMA or Ø5 mm connector, it is possible to choose fibers of any length with or without shielded sheathing

the standard optical fibers are:
[FIB02] Focused optical fiber for Ruby fluorescence (2m) SMA-Ø5
[FIB03] Focused optical fiber for Ruby fluorescence (3m) SMA-Ø5
[FIB03-SMA] Focused optical fiber for Ruby fluorescence (3m) SMA-SMA.
[FIB04] Focused optical fiber for Ruby fluorescence (4m) SMA-Ø5.
These references are available in other lengths and on request in a shielded version.

Input Ruby Signal & Extension : [050 132A]

It is an adapter piece allowing th place an objective directly on the optical transfer base

This part can be offered with different types of threading. Either the objectives ordered directly from BETSA® or already in your possession.

Input Ruby Signal & Extension : [050 181]

This extension allows the objective to be offset by an additional 50 mm.

It is even possible to put several one behind the other.

Input Ruby Signal & Extension : [050 182]

This 100 mm extension with a mirror at its end can recover the signal at 90°, the threaded tip can be adapted according to the sizes of the objective.

It can also be combined with the 50 mm extension

Input Ruby Signal & Extension : [050 1850]

This element is a telescopic extension including an achromatic doublet allowing a magnification x 2 (or other)
This allows to have a working distance greater than 100 mm and its extension tube limits the access of external parasitic lights

This element can be adapted according to the working distances as the length when passing through a vacuum chamber, cryogenic or high temperature furnace.

Display: Digital camera USB [CAM05]

The wide field of view of the eyepiece camera allows you to capture many details with a single image. Comes with software for Windows and software for MAC, which includes the functionality of measurement, annotation, video, time lapses, etc.

Magnification: 20x
• Resolution: 5 Megapixel (2592×1944)
• Frame rate / scde: 30
• Compatible eyepieces of: C mount
• Dimensions: 80mm (H) x 32mm (D)
• Cable length: 1.8m
• Interface: USB2.0
• Compatible with: Windows XP, Vista, 7, 8 & 10, MacOS 10.4 and higher versions
• Includes software: (Windows), (Mac OS)

Display: Camera support fixed [SCCF]

The fixed camera support allows the mounting of the camera offered by BETSA® on a type C thread

It is also possible to put any other camera on this adapter and also to modify the optical distance thanks to its large external thread.

Objective:

Infinity Corrected Long WD Objective

Objective X5 WD 35 mm [OBX5]
Objective X50 WD 12.7 mm [OBX50]
Objective X10 WD 33.5 mm [OBX10]
Objective X20 WD 20 mm [OBX20]

Laser assembly: Shutter laser [OBT01]

Laser shutter and white light beam commutator [OBT01]

It is designed to switch between the laser beam and a white light source, which allows for
- Automatically block the laser beam when measuring the background signal (For safety purposes, the laser beam is “ON” only during the measurement step.)
- Back lighting the sample when observing it.

Entrance diameter for the laser beam: 5mm.
Entrance diameter for the white light: 7 mm.
Electronic remote control (software or manual) : 0 V: laser off / light on. 5 V: laser on / light off.
Current : 200 mA.
Connection : Connected to PRL Interface.
Small size : 54 x 52 x 16 mm.

Other applications :
Commutation or blocking of any light beam.

Laser assembly: Module for variable circular filter [PFR01]

This variable filter holder module makes it possible to have filters of size 1 inch and on a rotation of 270 degrees it is possible to reduce the power of the laser 0 to 100%

This makes it possible to have control over the power of the laser during Ruby excitement without having to resort to an electronic power control interface

Laser assembly: Support LASER fine Tilt [LT01]

Laser is mounted on a fixed support which has a tilt for its adjustment. this element proposed by BETSA® with 250µ/turn screws allows a micrometric adjustment of this tilt, who gives it an accuracy of < 5µ

Laser assembly: Support LASER

The BETSA® optical transfer allows the adaptation of laser of different wave color and variable power of different manufacturer.

the robustness of the mechanics of the optical transfer allows assemblies of heavy elements of which here is an example of adaptation with a CNI® 473nm 150mW laser mounted with a BETSA® circular filter wheel

Laser assembly: Support LASER

BETSA® PRL [MONO01] Monochromator spetrometer

Spectrometer for high pressure measurements: PRL
The PRL spectrometer (Pressure by Ruby Luminescence) has been designed for measuring pressures using the luminescence of a reference material (Ruby or SrB407 : Sm 2+).
Its small size and weight make "on site" measurements possible.
Measurements are very easy and fast with custom high pressure calculation software.

Features:
- Detector, mobile gratting diffraction.
Spectral range 675-739nm,
Total mobility spectral range 616-760nm,
- Resolution : 0,1 nm. (window aperture 200µm).
- Sensitivity : 0,005 nm.
- pressure accuracy better than 0.05 GPa
- Highly stble temperature controller; cooling -10°C

PRL SPECTROMETER STANDARD ITEMS :
- Plane grating (600 lines /mm third order) 49cm²
- Achromatic doublet F= 160 mm.

An electronic interface sends the output signal to a computer through an interface and is read by a specific software for high pressure measurements

Monochromator spetrometer Ocean Optics [OO4PRO]

Monochromator Ocean Optics [OO4PRO]

HR4Pro spectrometers are compact. With a optical bench design and optimized components.

Monochromator Ocean Optics HR4PRO
High-resolution User-configured Spectrometer
detector, installed, with VIS window

OceanView spectroscopy soft. with graphical user interface 1 licence (2 installations)

Features:
- Spectral range 630-810nm,
- Resolution : 0.9 nm (FWHM) (window aperture 25µm).
- Minimal, exposure time 3.8 ms
- NO cooling
- Input fiber connector: SMA