EXHIBIT (a)(3)
NOTICE OF GUARANTEED DELIVERY
FOR
TENDER OF SHARES OF COMMON STOCK
OF
OPTICNET, INC.
TO
OPTO ACQUISITION SUB, INC.,
A WHOLLY OWNED SUBSIDIARY OF
BEI TECHNOLOGIES, INC.
(NOT TO BE USED FOR SIGNATURE GUARANTEES)
THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
NEW YORK CITY TIME, ON MONDAY, SEPTEMBER 15, 2003, UNLESS
THE OFFER IS EXTENDED.
This Notice of Guaranteed Delivery, or a form substantially equivalent
hereto, must be used to accept the Offer (as defined below) (i) if certificates
("Share Certificates") representing shares of common stock, par value $0.0001
per share ("Shares"), of OpticNet, Inc., a Delaware corporation, are not
immediately available, (ii) if Share Certificates and all other required
documents cannot be delivered to Mellon Investor Services, the depositary for
the Offer (the "Depositary") or (iii) if the procedures for book-entry transfer
cannot be completed on a timely basis. This form may be delivered by hand to the
Depositary or transmitted by facsimile transmission or mail to the Depositary
and must include a guarantee by an Eligible Institution (as defined in the
Purchaser's Offer to Purchase, dated August 18, 2003 (the "Offer to Purchase")).
See Section 2 of the Offer to Purchase.
The Depositary for the Offer is:
MELLON INVESTOR SERVICES LLC
<Table>
By Facsimile By Registered or By Overnight Courier: By Hand:
Transmission: Certified Mail:
Attn: Reorganization Dept. Attn: Reorganization Dept.
For Eligible Attn: Reorganization Dept. 85 Challenger Road 120 Broadway, 13th Floor
Institutions Only: P.O. Box 3301 Mail-stop -- Reorg New York, NY 10271
(201) 296-4293 South Hackensack, NJ 07606 Ridgefield Park, NJ 07660
For Confirmation Only:
(201) 296-4860
</Table>
DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TO A NUMBER
OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY TO THE
DEPOSITARY. DELIVERIES TO OPTICNET, INC. OR MELLON INVESTOR SERVICES, THE
INFORMATION AGENT FOR THE OFFER, WILL NOT BE FORWARDED TO THE DEPOSITARY AND
THEREFORE WILL NOT CONSTITUTE VALID DELIVERY.
THIS FORM IS NOT TO BE USED TO GUARANTEE SIGNATURES. IF A SIGNATURE ON A
LETTER OF TRANSMITTAL FOR THE OFFER IS REQUIRED TO BE GUARANTEED BY AN "ELIGIBLE
INSTITUTION" (AS DEFINED IN THE OFFER TO PURCHASE) UNDER THE INSTRUCTIONS
THERETO, SUCH SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED
IN THE SIGNATURE BOX ON SUCH LETTER OF TRANSMITTAL.
THE ELIGIBLE INSTITUTION THAT COMPLETES THIS FORM MUST COMMUNICATE THE
GUARANTEE TO THE DEPOSITARY AND MUST DELIVER THE LETTER OF TRANSMITTAL OR AN
AGENT'S MESSAGE (AS DEFINED IN THE OFFER TO PURCHASE) AND SHARES TO THE
DEPOSITARY IN THE TIME PERIOD SHOWN HEREIN. FAILURE TO DO SO COULD RESULT IN A
FINANCIAL LOSS TO SUCH ELIGIBLE INSTITUTION.
THE GUARANTEE ON THE REVERSE SIDE MUST BE COMPLETED.
Ladies and Gentlemen:
The undersigned hereby tenders to Opto Acquisition Sub, Inc., a Delaware
corporation (the "Purchaser") and a wholly owned subsidiary of BEI Technologies,
Inc., a Delaware corporation, upon the terms and subject to the conditions set
forth in the Offer to Purchase and in the Letter of Transmittal (which, together
with any amendments or supplements thereto, collectively constitute the
"Offer"), receipt of which is hereby acknowledged, the number of Shares set
forth below, all pursuant to the guaranteed delivery procedures set forth in
Section 2 of the Offer to Purchase.
Number of Shares: ------------------------------
Certificate Nos. (if available):
- --------------------------------------------------------------------------------
(Check box if Shares will be tendered by book-entry transfer) [ ] [The
Depository Trust Company]
Account Number
- --------------------------------------------------------------------------------
Dated
- --------------------------------------------------------------------------------
Name(s) of Record Holder(s):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
PLEASE PRINT
Address(es):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(ZIP CODE)
Daytime Area Code and Tel. No.:
- --------------------------------------------------------------------------------
Signature(s):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
2
GUARANTEE
(NOT TO BE USED FOR SIGNATURE GUARANTEE)
The undersigned, a firm that is a participant in the Security Transfer
Agent's Medallion Program or Nasdaq Stock Market Guarantee Program or the Stock
Exchange Medallion Program or an "eligible guarantor institution", as such term
is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as
amended, hereby guarantees to deliver to the Depositary either the certificates
representing the Shares tendered herewith, in proper form for transfer, or a
Book-Entry Confirmation (as defined in Section 2 of the Offer to Purchase) with
respect to such Shares, in any such case together with a properly completed and
duly executed Letter of Transmittal for the Offer (or a facsimile copy of it),
with any required signature guarantees, or an Agent's Message (as defined
Section 2 of the Offer to Purchase), and any other required documents, within
three trading days (as described in the Letter of Transmittal for the Offer)
after the date hereof.
The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver a Letter of Transmittal for the
Offer or an Agent's Message and certificates for Shares to the Depositary within
the time period shown herein. Failure to do so could result in a financial loss
to such Eligible Institution.
Name of Firm
- --------------------------------------------------------------------------------
Address(es):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(ZIP CODE)
Area Code and Tel. No.:
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
AUTHORIZED SIGNATURE
Name:
- --------------------------------------------------------------------------------
PLEASE TYPE OR PRINT
Title:
- --------------------------------------------------------------------------------
Dated:
- --------------------------------------------------------------------------------
NOTE: DO NOT SEND SHARE CERTIFICATES WITH THIS NOTICE. SHARE
CERTIFICATES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL FOR THE OFFER.
3